AUTOMATIC CONTROL VALVES

Transcription

1 R TM AUTOMATIC CONTROL VALVES

2 R TM Automatic Control Valves Index CONTENT PAGE Main Valve Hytrol 1 Main Valve Schematic Diagram 2 Quick Selection / Performance Chart 3 Hytrol Part Listing 4 Hytrol Dimensions New Globe Execution (NGE) 5 Hytrol Dimensions New Globe Execution (GE) 6 Main Valve Tytan 7 Cavitation Guide 8 Quick Valve Selection / Flow Chart 9 CLA-VAL SERIES 40-01/ Rate of Flow Control Valve 10 CLA-VAL SERIES 50-01/ Pressure Relief, Pressure Sustaining Valve 11 CLA-VAL SERIES 60-32/ Pump Control & Back Pressure Valve 12 CLA-VAL SERIES 90-01/ Pressure Reducing Valve 13 CLA-VAL SERIES / On/Off Float Control Valve 14 CLA-VAL SERIES / Modulating Float Control Valve 15 CLA-VAL SERIES / On/Off Electrical Remote Control Valve 16 CLA-VAL SERIES / On/Off Altitude Level Control Valve 17 CLA-VAL KO Anti Cavitation Hytrol Valve 18 Cla-Val SERIES ECO Dual Stage Pressure Reducing Valve 19 CLA-VAL SERIES Dual Stage Pressure Management Control Valve 20 CLA-VAL SERIES PCM Pressure Reducing Valve 21 CLA-VAL Roll Seal 22 H-Strainer 23 Typical Waterworks Network 24 Why Specify CLA-VAL Automatic Control Valves 25

3 Simple, Reliable and Accurate Main Function CLA-VAL Main Valve HYTROL The CLA-VAL Model Hytrol Valve is a hydraulically operated, diaphragm actuated, single chambered globe or angle pattern valve. It consists of three major components, namely: the body, cover and diaphragm assembly. The diaphragm assembly is the only moving part, and forms a sealed chamber in the upper portion of the valve, separating operating pressure from line pressure. The synthetic rubber sealing disc, with rectangular cross section, is supported on three and a half sides by a disc guide and a disc retainer, and forms a drip tight seal. The Model is the basic valve used in nearly all CLA-VAL Automatic Control Valves. There are three HYTROL types: Globe Execution New Globe Execution Angle Pattern 100A-01 or 100A-20 Cover Diaphragm Disc retainer & rubber disc Diaphragm assembly Seat Body Stem On/Off Control Principle of Operation On/Off Control Modulating Control Valve Fully Open When pressure in the cover chamber is relieved to a lower pressure or to the atmosphere, the inlet pressure opens the valve. Valve Closure When inlet pressure is applied to the cover chamber, the valve closes drip-tight. Valve Closure A Cla -Val modulating pilot control is fitted to automatically compensate for line pressure changes. 1

4 CLA-VAL HYTROL VALVE Main Valve Schematic Diagram Normal size cavitation breaker GLOBE EXECUTION Main Valve: Model High flow valve High Cv flows Normal seat lift at low flow Available sizes DN50 - DN300 (SA Manufactured) DN350 - DN600 (Ex Import) Normal seat lift at low flow Large size cavitation breaker NEW GLOBE EXECUTION Main Valve: Model Cavitation resistant Normal CV flows Fast seat lift at low flow Available sizes DN80 - DN200 (SA Manufactured) DN250 - DN1200 (Ex Import) Fast seat lift at low flow Normal size cavitation breaker ANGLE PATTERN Main Valve: Model 100A-01 High flow valve High Cv flows Available sizes DN32 - DN400 (Ex Import) Normal seat lift at low flow 2

5 CLA-VAL Quick Selection / Performance Chart Materials, Sizes and Tempratures Body & Cover Disc Retainer & Diaphragm Washer Disc Guide Stem Stem Nut PN16 / PN25 / PN40 Ductile Iron SABS 936 Grade 42 (BS 1563 Grade 420/12) Ductile Iron SABS 936 Grade 42 (BS 1563 Grade 420/12) 304 Stainless Steel 316 Stainless Steel 303 Stainless Steel Pattern Screwed Flanged Globe 10mm - 80mm 40mm mm Angle 40mm - 80mm 50mm - 600mm Fluids -4ºC to 80ºC Spring 302 Stainless Steel Sealing Disc Diaphragm Nitrile Rubber (Buna-N) Nitrile Rubber (Buna-N) Nylon Reinforced Cover Bearing Gunmetal BS 1400 LG 2 Seat Coating Stainless Steel ASTM A743 CF-8 Fusion Bonded Epoxy Coated or Two Pack Epoxy Coated Other Materials Available on Request 316 Stainless Steel 40mm to 200mm Cast Steel (WCB) 50mm 400mm Also available in: FM Approval and UL Listing Q = Kv Q = Cv H = p p 2 v 2g Q Kv Cv p : rate of flow (m3/h) : flow coefficient (m3/h) : flow coefficient (l/s) : head loss (bar) H v g : head loss (m) : average pipe velocity (m/s) : gravitational constant (9.81m/s2) : resistance coefficient (-) % Lift (stem lift) For an appropriate operation, valve should be sized at 70% total Lift Fast Lift : 10% Cv = 25% Lift Normal Lift : 10% Cv = 15% Lift % Cv (flow coefficient) New Globe Execution (NGE) Globe Execution (GE) 3

6 CLA-VAL HYTROL VALVE Part Listing for NGE & GE Nut Washer Cover bearing assembly Cover Cover Cover bearing Spring Stem nut GE : DN400 NGE : DN500 - DN600 Diaphragm washer Diaphragm Disc retainer Space washer Disc Disc guide Seat screws Stem Seat Stud Seat O-ring Seat O-ring Body Body GE : DN200 - DN400 NGE : DN250 - DN600 4

7 CLA-VAL Dimensions New Globe Execution (NGE) Stem Hm Ø C L Approx. outer limits of pilot-system H1 H Approximate Weight Complete Valve : 100% Ø F B Cover Trim = 20% = 20% A Body = 60% TECHNICAL DATA (mm) Flanged (mm) L F H H1 (PN10) H1 (PN16) H1 (PN25) Hm A B Ø C Weight (Kg) HYDRAULIC DATA Flanged (mm) Kv (m³/h) Cv (l/s) The Kv or Cv = m ³ /h or 100 kpa (1 bar) head loss with 15º C water (valve totally open) 5

8 CLA-VAL Dimensions New Globe Execution (GE) Hm Stem H Ø C L DN 40 - DN 200 H1 Screwed pattern H2 L DN DN 400 B Approximate Weight Complete Valve : 100% A Ø F L1 Rp 1 1/2" - 3" L1 Rp 1 1/4" Cover Trim Body = 20% = 20% = 60% Approx. outer limits of pilot-system TECHNICAL DATA (mm) Flanged (mm) Screwed (in) 1¼" 1½" 2" 2½" 3" L L F H H1 (PN10-16) H1 (PN25) H Hm A B Ø C Weight (Kg) HYDRAULIC DATA Flanged (mm) Screwed (in) 1¼" 1½" 2" 2½" 3" Kv (m³/h) Cv (l/s) The Kv or Cv = m ³ /h or 100 kpa (1 bar) head loss with 15º C water (valve totally open) 6

9 CLA-VAL Main Valve TYTAN CLA-VAL SERIES 100 : Main Function Simple, Reliable and Accurate The Cla-Val TYTAN Valve is a hydraulically operated, diaphragm actuated, globe pattern valve. It consists of three major components namely the body, diaphragm assembly and cover. The diaphragm assembly is the only moving part, guided top and bottom by a precision machined stem. The disc retainer and rubber disc form a drip-tight seal with the renewable seat when pressure is applied above the diaphragm (cover chamber). The Cla-Val is the main valve used in nearly all Cla-Val TYTAN automatic control valves. TYTAN Sizes: DN700 to Dn1200 Standard: PN10, PN16, PN25 On request: PN40, ANSI TYTAN norms: ISO and ANSI CLA-VAL SERIES : Principle Operation When pressure in the cover chamber is relieved to a lower pressure zone or to atmosphere, the pressure inlet opens the valve. When pressure from the inlet pressure is applied to the cover chamber, the valve closes drip-tight. The valve is pressure operating balanced. The Cla-Val modulating controls will allow the valve to automatically compensate for pressure changes. Usual main valves Hytrol valve / Hytrol NGE Tytan valve Auxillary Hytrol valve TT Roll seal main valve Deluge main valve 100G Tubular diaphragm valve (TDV) For other functions please contact DFC Water. 7 Usual main valves Schematic diagram Quick valve selection Dimensions Pressure ratings and materials TYT001FE DE DE DE

10 CLA-VAL Cavitation Guide Cavitation Risk Contact CLA-VAL NGE Valve Cavitation Risk Contact CLA-VAL GE / AE Valve Pi, Inlet Pressure [bar] Pi < Po Pi, Inlet Pressure [bar] Pi < Po bar offset bar offset Po, Outlet Pressure [bar] Po, Outlet Pressure [bar] Valve Sizing Example Pipe diameter : 100 [mm] Peak Flow : 20 [l/s] NGE : New Globe Execution GE : Globe Execution AE : Angle Execution NGE DN 100 [mm] ( Flow Chart DE ) Inlet Pressure : 15 [bar] Outlet Pressur Below Cavitation Risk ( Cavitation Chart DE-1) e : 5 [bar] Note Diagram to be used as a guide only. To obtain a more accurate calculation please contact DFC Water. Quick Valve Selection (Flow Chart) Quick Valve Selection (Performance Chart) 00121DE DE-2 Sizing Software Run CLA-VAL Softwares 8

11 CLA-VAL Quick Valve Selection: Flow Chart Size End Details New Globe Execution NGE NORMAL FLOW RANGE (l/s) Angle Execution AE Globe Execution GE Maximum Continuous Flow (l/s) Capacity Pattern Cavitation Resistance Material Standard 1Å" SCREWED 1½" " ½" " * Auxilliary Hytrol Valve?", ½", ¾", 1" refer to TT 32mm mm mm mm mm mm mm FLANGED 150mm mm mm mm mm mm mm mm mm mm Note More Information - Normal flow range based on 1 m/s to 3 m/s Quick valve selection chart DE-1 - Maximum continuous flow based on 5 m/s - Surge flow up to 10 m/s consult factory Quick valve selection DE-2 (Performance chart) Refer to DE-3 to -5 for friction losses Sizing software Run Cla-Val Low softwares Normal High Available sizes 9

12 The CLA-VAL SERIES 40/640 Rate of Flow Valve is used to accurately limit excessive flow to a preselected maximum flow rate regardless of varying demand (Flow Control). The X52A-1 orifice plate assembly is included. Features and Benefits Automatic operation Easy adjustment and maintenance Accurately limits flow rates Simple, Reliable and Accurate CLA-VAL / Rate of Flow Control Valve CLA-VAL SERIES 40/640 : Main Function CLA-VAL 40-01/ : Typical Application The CLA-VAL 40-01/ is typically installed where water supply to a system (inlet to a reservoir, industrial users, etc) must be limited to a maximum flow rate. Strainer AQUA Orifice plate assembly Air release & vacuum break valve VENT-O-MAT RBX The Orifice Plate assembly may be fixed directly to the main valve outlet flange, however better control is obtained if it is installed in stabilized flow conditions downstream of the valve. The ideal position would be between one and five pipe diameters downstream of the valve. CLA-VAL Usual SERIES 40/640 : Combinations Main Valve / Rate of Flow Control 40-01/ Float Control 46-01/ Check valve 41-01/ Solenoid on/off 43-01/ Pressure sustaining 45-01/ Pressure reducing 49-01/ For other functions please contact DFC Water. 10

13 The CLA-VAL SERIES 50/650 Sustaining Valve accurately maintains a minimum preset inlet pressure regardless of changing flow rate (Sustaining Control). The CLA-VAL SERIES 50/650 Relief Valve opens fast to dissipate excess system pressure. Features and Benefits Automatic operation Accurate pressure control Fast opening / slow closing CLA-VAL / Pressure Relief, Pressure Sustaining Valve Simple, Reliable and Accurate CLA-VAL SERIES 50/650 : Main Function (sustaining) P1 (bar) inlet pressure P2 (bar) outlet pressure CLA-VAL 50-01/ : Typical Application The CLA-VAL 50-01/ (Sustaining Service) is typically installed in a line between an upper zone and a lower area of heavy demand or tank, the valve acts to maintain desired upstream pressure to prevent "robbing" of pressure in upper zone. Strainer AQUA CLA-VAL Air release & vacuum break valve VENT-O-MAT RBX The CLA-VAL 50-01/ (Relief Service) is installed to protect the system or installations against high pressure surges, eg. when pumps are suddenly shut down. The valve is installed near the pump on a line discharging to atmosphere. Lower area or tank Usual SERIES 50/650 : Combinations Main valve / Pressure Relief/Sustaining Valve 50-01/ Check valve 51-01/ Surge Anticipator 52-01/ Solenoid on/off 58-01/ For other functions please contact DFC Water. 11

14 The CLA-VAL SERIES 60/660 Pump Control Valve is a pilot operated valve designed for installation on the discharge of pumps to prevent pipeline surges caused by the starting and stopping of pumps. Features and Benefits Automatic Operation Easy Adjustment and Maintenance Unparalleled Technical Support CLA-VAL / Pump Control & Back Pressure Valve Simple, Reliable and Accurate CLA-VAL 60-31/ : Operation Pump off When the pump is off a hydraulic check feature keeps the valve in the closed position. Starting sequence The pump starts against a closed valve. When the working pump rate is reached the solenoid control gradually opens the valve to prevent pump surge. This opening rate shall be fully adjustable on site. The pump opening will be limited by the pressure sustaining feature; this feature will ensure the valve opens under controlled hydraulic conditions. When the sustaining set point is reached, the sustaining pilot will open fully, thus allowing the valve to fully open. CLA-VAL SERIES 50/650 : Main Function (sustaining) Pressure relief valve or surge anticipator valve Stopping sequence The pump requires a closed valve. The shut-off signal will de-energize the solenoid control to close the valve slowly. Meanwhile the pump is still working. When the valve is fully closed the switch assembly shuts the pump off. Usual SERIES 60/660 : Combinations Main Valve / Pump Control Valve 60-31/ Booster Pump Control Valve 60-11/ With High Capacity Pilot System 60-19/ Deep Well Pump Control Valve 61-02/ For other functions please contact DFC Water. 12

15 The CLA-VAL SERIES 90/690 Pressure Reducing Valve reduces a higher inlet pressure to a constant downstream pressure regardless of changing flow rate and or varying inlet pressure (Pressure Reducing Control). Features and Benefits Automatic Operation Easy Adjustment and Maintenance Sensitive & Accurate Pressure Control Simple, Reliable and Accurate CLA-VAL / Pressure Reducing Valve CLA-VAL SERIES 90/690 : Main Function CLA-VAL 90-01/ : Typical Application The CLA-VAL 90-01/ is designed to hold downstream pressure to a predetermined limit. Typical Pressure Reducing Valve station using two valves in parallel to handle high flows and low flows. CLA-VAL Air release & vacuum break valve VENT-O-MAT RBX Strainer AQUA Usual SERIES 90/690 : Combinations Main Valve / Pressure Reducing Valve 90-01/ Check Valve 91-01/ Pressure sustaining 92-01/ Sustaining + Check 92-02/ Solenoid on/off 93-01/ Surge control 94-01/ Low flow system 90-01LFS/690-01LFS For other functions please contact DFC Water. 13

16 The CLA-VAL SERIES 124/624 Float Valve is a non modulating valve which accurately controls the liquid level in tanks or reservoirs. The valve is designed to fully open when the liquid level reaches a preset low point and close drip tight when the level reaches a preset high point. Use series / for valve sizes 150mm and smaller and use series / (high capacity control) for valve sizes 200mm and larger. Features and Benefits Accurate and repeatable level control On/Off non modulating action Fully adjustable high and low level settings Simple, Reliable and Accurate CLA-VAL / On/Off Control Valve Schematic Diagram Item Description 1 Hytrol (Main Valve) 2 CF1-C1 Float Control S Optional Features D Y C Item A B C F S Y Description X46A Flow Clean Strainer CK2 Cock (Isolation Valve) CV Flow Control (Closing) Independent Operating Pressure CV Flow Control (Opening) X43 "Y" Strainer F B INDEPENDENT OPERATING PRESSURE INLET S A 1 B OUTLET CLA-VAL / : Typical Application CLA-VAL The CLA-VAL / is commonly mounted above the high water level in a tank. The float mechanism (CF1-C1) may be located remotely from the main valve. A stilling well (200mm minimum diameter) must be provided around the float, as the liquid surface is subject to turbulence (not supplied with the valve) Tank Usual SERIES 124/624 : Combinations Main Valve / On/Off Float Control Valve (150mm + Smaller) / (200mm + Bigger) / Rate of Flow 46-01M/646-01M + Pressure Sensitive Closing / Sustaining / For other functions please contact DFC Water. 14

17 The CLA-VAL SERIES 129/629 Float Valve maintains a relatively constant level in storage tanks and reservoirs by admitting flow into the tank in direct proportion to the flow out of the tank. As the liquid level changes, the float control proportionally opens or closes the main valve, keeping the liquid level nearly constant. Features and Benefits Accurate and repeatable level control Proportional flow Completely automatic operation CLA-VAL / Modulating Float Control Valve Simple, Reliable and Accurate 4 Schematic Diagram D1 2 3 Item Description 1 Hytrol (main valve) 2 X47A Ejector 3 Bell Reducer 4 CFM2 Float control Y F B B C S D2 D3 Optional Features INDEPENDENT OPERATING PRESSURE INLET OUTLET Item A B C D F S Y Description X46A Flow cleaner strainer CK2 Cock (isolation valve) CV Flow control (closing) Check valves with cock Independent operating pressure CV Flow control (opening) X43 "Y" strainer A The "D" feature on a vertically installed 6" and larger valve must be horizontally installed. 1 CLA-VAL / : Typical Application Float Control The CFM2/120 Float Control should be located in a still liquid surface. A stilling well may be required to obtain this condition. Mount the control on the connecting piping with the outlet port at the desired high water level. CLA-VAL / Control Piping (Not Furnished) TANK Isolation Valves Usual SERIES 129/629 : Combinations Main Valve / Modulating Float Control Valve / Rate of Flow 46-01/ Check Valve / Solenoid Shutoff / Manual Override / Pressure Protected Float Valve M/629-12M For other functions please contact DFC Water. 15

18 The CLA-VAL SERIES 136/636 Solenoid Control Valve is an On/Off Control Valve which either opens or closes upon receiving an electrical signal to the solenoid pilot control. The valve is furnished either normally open (de-energized to open), or normally closed (energized to open). Features and Benefits Fast acting solenoid control Easy adjustment and maintenance Simple design, proven reliable CLA-VAL / On/Off Electric Remote Control Valve Simple, Reliable and Accurate CLA-VAL SERIES 136/636 : Main Function CLA-VAL / : Typical Application The CLA-VAL / Solenoid Control Valve is an On/Off Control valve which either fully opens when the solenoid is energized or full closes when it is deenergised. The CLA-VAL / is typically designed for industrial uses like control of process water for batching, mixing, washing or other on/off applications. The valve can also be used as a level control valve by using a float switch to send an electrical signal to open or close the valve Usual SERIES 136/636 : Combinations Strainer AQUA CLA-VAL Air release & vacuum break valve VENT-O-MAT RBX Main Valve / On/Off Electrical Remote Control / High Capacity Control / Check Valve / Voltages Available 24V DC/AC 110V DC/AC 220V DC/AC For other functions please contact DFC Water. 16

19 The CLA-VAL SERIES 210/610 On/Off Altitude Level Control Valve controls the high water level in a reservoir or closed tank without the need for floats or other devices. It is a non throttling valve that remains fully open until the shutoff point is reached. Features and Benefits Accurate and repeatable level control Easy adjustment and maintenance Drop tight positive shut off CLA-VAL / On/Off Altitude Level Control Valve Simple, Reliable and Accurate CLA-VAL SERIES 210/610 : Main Function 20mm I.D. 300mm Slope Shut-off point Accuracy 2cm CLA-VAL SERIES 210/610 : Typical Application The CLA-VAL / is typically designed for closed reservoirs where water is withdrawn through a separate line. The desired water level is set by adjusting the spring force. The pilot control operates on the differential in forces between a spring load and the water level in the reservoir. The CLA-VAL / is one way flow only. The reservoir pressure sensing line should be 20 mm minimum l.d. installed with a 300mm slope from the valve to the reservoir to avoid air pockets. Air release & vacuum break valve VENT-O-MAT RBX CLA-VAL Usual SERIES 210 : Combinations Main Valve / On/Off Altitude level control valve / Flow control / Check valve / Sustaining / For other functions please call DFC Water. 17

20 Virtually cavitation free operation Severe service design - high pressure differentials Reduced noise and vibration 316 Stainless Steel trim standard Service without removal from line Drip tight, positive sealing Retrofit to standard Hytrol valves Simple, Reliable and Accurate The Cla-Val Model KO Anti-Cavitation Hytrol Valve is designed for applications where there is a high potential for damage from cavitation. Specify this valve series for a wide variety of control valve applications having pressure differentials up to 20 Bar or for relief valves having atmospheric discharge up to 10 Bar. CLA-VAL KO Anti-Cavitation Hytrol Valve The KO Hytrol main valve provides optimum internal pressure control through a unique anti-cavitation trim (patentpending) design. Constructed of 316 Stainless Steel, the seat and disc guide trim components feature dual interlocked sleeves containing radial slots that deflect internal flow to impinge upon itself in the center of the flow path, harmlessly dissipating the potential cavitation damage. This unique design also lessens the possibility of fouling if large particles in the water are present due to the large flow path of the radial slots. The KO Hytrol is the basic valve used in Cla-Val Automatic Control Valves for high differential applications requiring remote control, pressure regulation, solenoid operation, rate of flow control, or liquid level control. The anti-cavitation trim components can be retrofitted to existing valves if the application indicates an appropriate need. Please consult factory for details. Flow enters through the slot detail of the seat. The slot orientation directs flow towards the center of the chamber where flow converges. Flow exits trough the disc guide slots are angularily oriented to direct flow away from the valve Outlet Outlet Flow exits trough the disc guide slots are angularily oriented to direct flow away from the valve 18

21 CLA-VAL ECO : Main Function CLA-VAL ECO Dual Stage Pressure Reducing Valve with Electronic Autonomous Controller e-smart/l1 Simple, Reliable and Accurate The CLA-VAL SERIES ECO are standard Cla-Val valves including electronic autonomous battery controllers e-smart/l1. These controllers extend the traditional range of applications of the Cla-Val valves, adding time, flow or switch controls. Features and Benefits Completely automatic operation Easy adjustment and maintenance Quality approved materials World wide support CLA-VAL ECO : Typical Application CLA-VAL ECO The CLA-VAL ECO is a double stage pressure reducing CLA-VAL valve. The CLA-VAL ECO is designed to select, according to a definite time range as well as a preset flow value, the stage of regulation for the downstream pressure. Typically the high pressure stage is selected when the consumption is high and vice versa. In case of fire demands the electronic controller e- Smart/L1 immediately selects the highest pressure stage in order to guarantee the appropriate fire protection flows. Strainer AQUA Air release & vacuum break valves VENT-O-MAT RBX Usual SERIES ECO : Combinations CLA-VAL e-line introduction LIN001DE CLA-VAL ECO description LIN011DE CLA-VAL e-smart/l1 specification LIN021DE Flushing valve ECO Dual stage pressure reducing valve ECO On/Off + 2 way flow control valve ECO On/Off control valve ECO Dual modulating float control valve ECO For other functions please contact DFC Water. 19

22 CLA-VAL Dual Stage Pressure Management Control Valve 2-Stage Hydraulic Control Simple, Reliable and Accurate The CLA-VAL SERIES 98 Pressure Management Control Valve automatically adjusts the downstream pressure based upon demand changes in the system. Features and Benefits System efficiency Pipe break prevention 100% hydraulic control World wide support CLA-VAL : Main Function Modulating Profile Downstream pressure Upstream pressure Economy CLA-VAL : Typical Application The CLA-VAL is a fully adjustable control valve which automatically changes the outlet pressure from a high setting during high flow conditions to a low setting during low flow conditions. The patent pending all-hydraulic operation assures smooth ramping between the set-points as the flow changes. Strainer AQUA CLA-VAL Air release & vacuum break valves VENT-O-MAT RBX The CLA-VAL optimizes the system pressure to reduce costly system leakage losses and pipe bursts. Recommended typical assembly for CLA-VAL automatic control valves The H-Strainer AQUA combined with the anti-shock air release & vacuum break valve VENT-O-MAT RBX are added system products for the best CLA-VAL regulation. Make your valve even Better! LFS Option? KO Option? KG1 Option? Maintenance? Control low flow or night flows Extend valve life with anti-cavitation trim Use stem cleaning for harsh water Check on periodic maintenance Environment? Security? Protection? Corrosion? Adapt to high temperatures or frost risk Add hydraulic safety back-up to your valve Remove excessive system overpressures Protect your valve with upgraded materials 20

23 Simple, Reliable and Accurate CLA-VAL PCM Pressure Reducing Valve Actuated Pilot 4-20 ma The CLA-VAL SERIES PCM is a range of Electronic Actuated Pilot Control Valves that combines precise control of field proven CLA-VAL hydraulic pilots and simple electronic actuated motor. The CLA-VAL SERIES PCM valves, including a hydraulic pilot and integral controller, which accept a remote set-point command input to make smooth adjustments to the pilot. Features and Benefits Completely automatic operation Easy adjustment and maintenance Quality approved materials World wide support CLA-VAL SERIES PCM : Main Function 4-20 ma Remote set point CLA-VAL PM : Typical Application The CLA-VAL PCM is designed to hold downstream pressure to a pre-determined limit and to maintain a constant downstream pressure set-point. The simple remote changing (4-20 ma analog) of valves set point is suitable for many applications where the process variable monitored separately and a SCADA or similar remote control system provides valve control. Strainer AQUA CLA-VAL PCM Air release & vacuum break valves VENT-O-MAT RBX Recommended typical assembly for CLA-VAL automatic control valves The H-Strainer AQUA combined with the anti-shock air release & vacuum break valve VENT-O-MAT RBX are added system products for the best CLA-VAL regulation. Make your valve even Better! LFS Option? KO Option? KG1 Option? Maintenance? Control low flow or night flows Extend valve life with anti-cavitation trim Use stem cleaning for harsh water Check on periodic maintenance Environment? Security? Protection? Corrosion? Adapt to high temperatures or frost risk Add hydraulic safety back-up to your valve Remove excessive system overpressures Protect your valve with upgraded materials 21

24 Simple, Reliable and Accurate CLA-VAL Series Roll Seal The Cla-Val Model Roll Seal Valve is a hydraulically operated valve used to control liquid flow by means of a flexible control element (the liner). The basic valve consists of only two parts a one piece, investment cast body and an elastomeric liner. The valve body is constructed with internal ribs and slots forming a grillwork which surrounds the liner to provide support. A normally closed type valve is formed by the installed liner which covers the grillwork and seats against the raised seating surface in the valve body. NSF Upstream pressure actuates the valve to produce valve opening by rolling the liner off the seating surface and the slotted grillwork. The valve is actuated by upstream pressure as the loading pressure (pressure supplied to the control chamber) is varied by an external pilot control system. A typical pilot control system used to operate the Model valve consists of a restriction and a suitable pilot connected to the valve. Principle of Operation PILOT CONTROL VALVE PILOT CONTROL VALVE PILOT CONTROL VALVE RESTRICTOR RESTRICTOR RESTRICTOR SEATING AREA SEATING AREA SEATING AREA INLET INLET INLET CONTROL CHAMBER CONTROL CHAMBER CONTROL CHAMBER Model Valve in Closed Position Upstream pressure is introduced to the control chamber (the chamber formed behind the liner) of the Cla-Val Model Roll Seal valve through the control piping and restrictor. When the pilot is closed, full inlet pressure is supplied to the control chamber, thus balancing the force developed by inlet pressure acting on the upstream face on the liner. Under these conditions, the liner remains in the fully closed position. Since the operating pressure in the control chamber is greater than the outlet pressure, an additional closing force is developed across the liner, pressing the liner against the surrounding slotted grillwork area and seating surface. Model Valve in Partially Open Position As loading pressure is lowered slightly below inlet pressure, the central portion of the liner is forced to invert and come to rest against the tip of the control chamber cavity. Reducing the loading pressure further (but still higher than outlet pressure) causes the liner to drape over the cone shaped portion of the control chamber cavity. This action causes the outer section of the liner to roll off the seating surface and a portion of the grillwork to partially open the valve. Model Valve in Fully Open Position The valve is fully opened when loading pressure is sufficiently reduced to allow the liner to roll back completely and expose the full slot area. Restoring loading pressure reverses the liner rolling action to return the liner to the fully closed position. Usual SERIES 60/660 : Combinations Main Valve Pressure Reducing Pressure Relief Level Control

25 CLA-VAL H - Strainer Simple, Reliable and Accurate AQUA : Construction Body and cover in ductile iron GGG40 with epoxy coating Strainer in stainless steel 316 on a ductile iron epoxy coated frame Strainer mesh: standard 2 mm (option 1 mm or 1,5 mm) Flanges drilled according to PN10, PN16, PN25 or PN40 for DN 40 - DN 200 Flanges drilled according to PN10, PN16, PN 25 for DN DN 600 Bolts in 303 stainless steel AQUA : Operation and Installation The AQUA strainer is used when effective filtration is required. Of compact design, maintenance is fast and easy and requires only top cover removal. The flat stainless steel strainer mesh perpendicular to flow optimizes pressure drop. Moreover, the AQUA model can be equipped with an autonomous programmable flushing valve (Cla- Val SERIES ECO) allowing fast flushing without removing top cover. The strainer may be installed in any position, however installation with the cover on top side is recommended. H - Strainer with rapid purge arrangement Sizes: DN40 - DN600 Pressure: PN10, PN16, PN25 and PN40 Maximum temperature: 80º C Rp 1 ¼ B : PN10 - PN16 BB : PN25 - PN40 DIMENSIONS (mm) Flanged A B BB C D Weight (Kg) HEAD LOSS VALUES Flanged Kv (m³/h) Cv (l/s) K The Kv or Cv = m ³ /h or 100 kpa (1 bar) head loss with 15º C water (valve totally open) 23

26 R TM TYPICAL WATERWORKS NETWORK FILTRATION CONTROL Modulating Float Level Control (Series 129) Flow Control (Series 40) Check Valve (Series 81) Remote Step by Step Control (Series 136) Pressure Relief (Series 50) RESERVOIR CONTROL (Closed tanks) On/Off Float Level Control (Series 124) or Modulating Float Level Control (Series 129) Surge Control (Series 50) Pump Control (Series 60) On/Off Altitude Level Control (Series 210) Pressure Sustaining Control (Series 50) Pressure Reducing Station (Series 90) NETWORK PROTECTION Excess Flow Control (Series 85) NETWORK CONTROL NETWORK CONTROL NETWORK CONTROL NETWORK PROTECTION RESERVOIR CONTROL (Open Tanks) Pressure Reducing and Pressure Sustaining (Series 90) Remote On/Off Control (Series 135E/D) REMOTE CONTROL NETWORK FEEDING (Pump Control) 24

27 R TM WHY SPECIFY CLA-VAL AUTOMATIC CONTROL VALVES? INTRODUCTION Control valves form an essential part of the effective and efficient operation of any pipeline system. Selection of these devices is highloyndtehpeepnedrasnotnal experience of the engineer, the detail in manufacturer s product literature and published imperical data. It is often assumed, due to the laicskheodf pfiuebldl data that at least, all control valves are the same in performance. Control valves for this reason, are often specified based on the desired functiocneoivr,efdoraadvpaenrtage which may in essence have no bearing on the valve s effectiveness. As an integral component to any pipeline system, control valves should be selected as with all other pipeline components on the cost of owinmerpslhieips which weighing up the initial cost of the valve against; maintenance, requirements, ease of installation, effectiveness of operation, avaairleabsialintyd,otfescphnical support and after sales backup. Cla-Val, when assessed against these requirements and for the reasons outlined below, is the most obvious choice for all your control valves needs. THE CLA-VAL DIFFERENCE Low Flow Conditions Low flow conditions cannot be accommodated for in conventional control valves without the addition of paraphernalia such as Vee Ports and thmealiykpertehsaent additional operational problems. Alternatively, expensive changes to the pipeline are recommended such as installation of reducing pieclelesradnidamsmetaer valves or, installation of low flow bypasses. Model 600 Cla-Val Hytrols provide a cost effective and efficient reduced port design to cope with low flow conditions. Resistance to Cavitation Damage High pressure drops or excessive flow conditions will inevitably cause cavitation which result in high noise, excessive vibration and damalvaeg.edtoestihgenvs utilizing Vee Ports do not prevent but aggravate this destructive phenomenon. The use of multiple orifice plates is often not practicalnisn waphpelriecathtieore is limited space; in addition, the solution is removed from the valve and can lead to error in application. The specific design of the model 600 CLa-Val with its enlarged flow area around the seat allows for vapour bubbles to slow down before dispostihnegwaaglalsinosft the valve housing, reducing potential cavitation damage. A ratio of 4 to 1 reductions in pressure can be maintained without damage. In addition, Cla-Val provides a proven, radial design cartridge that can be fitted to its standard hytrol design for severe applications. High Differential Pressure Applications The stem of a control valve is often subjected to high differential pressures. Stems of Wye (Y) Pattern (sometimes called semi-straight) deesnigtrnasllayrgeucided. The inclined operation of the stem in addition to its central guidance often leads to excessive wear of the o-ring seals and bearings and subks.evqeuenptolretas, which may cause a number of operational problems, are often specified to provide more controlled guidance to the stem. The Cla-Val non-magnetic stem as standard is fully guided through its complete stroke by two replaceable bearings. Sensitive and Critical Flow and Pressure set Points Pilot control systems form the heart of any control valve design. Most manufactures provide a limited selection of pilot controls or, makweauysceoonftrtohlrsee which result in inaccuracy in control due to the shifting of the control point. The two-way modulating control systems manufactured by Cla-Val are designed to minimize set point fluctuations. Stem movement of these cloimntirtoelds taore one-mm, hence the spring is compressed by one-mm maximum, and the modulus of the spring does not change over this distance of compression,threesulting in set point remaining constant. Cla-Val in addition provides the widest selection of control systems. Ease of Maintenance It is prudent, regardless of design, to maintain control valves regularly. Large diameter, Wye (Y) pattern valves are difficult to maintainbdounenteottihnestalled at an angle. Cla-Val utilizes a globe pattern design and has only moving part which makes for ease of maintenance Local Manufacture Cla-Val has been available in South Africa since 1977 and has been locally manufactured, under licence to CLa-Val Co., by Dynamic Fluid Ctdosnitnrocle(Pty) L The Local market, because of this relationship has access to more than sixty five years of global experience in real world and demanding cpoenrattrioolnvainlve o applications such as waterworks distribution systems, fire protection systems, farm irrigation, navy ship systems, ground fueling falunid ihnadnudsltirniagl systems. In addition, the market is updated and kept on the edge of technological advancement in electronic and hydraulic control systems through CLa-Val s Co s aggressive and continued research and development program. Sales and Field Service Cla-Val provides highly committed customer orientated sales, services, spares and technical back up - TRY US! 25