UNA 26h Stainless Steel Design. Installation Instructions Stainless Steel Steam Trap UNA 26h

Transcription

1 UNA 26h Stainless Steel Design Installation Instructions Stainless Steel Steam Trap UNA 26h 1

2 Capacity Chart QC [kg/h] QH [kg/h] x F (based at saturated steam) [lb/h] [kg/h] Orifice 32 Orifice AO Orifice AO bar Factor F psi PMX Orifice 2, DN mm (1½ + 2") 6 Orifice 32, DN mm (1½ + 2") 2 Orifice 4, DN mm (1½ + 2") 7 Orifice 4, DN mm (½ 1") 3 Orifice 8, DN mm (1½ + 2") 8 Orifice 8, DN mm (½ 1") 4 Orifice 13, DN mm (1½ + 2") 9 Orifice 13, DN mm (½ 1") 5 Orifice 22, DN mm (1½ + 2") 10 Orifice 22, DN mm (½ 1") 5 Orifice 2, DN mm (½ 1") 11 Orifice 32, DN mm (½ 1") Fig. 1 2

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4 Parts Drawings P Q A B C D G E F H F O F I N M L H K F Fig. 2 J 4

5 Key A B C D E F G H I J K L M N O P Q Socket-head screw (DN mm) Name plate Control unit Simplex Body gasket (graphite/crni) Hand vent valve Gasket 17 x 23 Control unit Duplex Plug Float lifting lever with handle Cover Socket-head screw Seat Seat gasket (graphite/crni) Deflector Body Hexagon nut (DN mm) Fixing stud (DN mm) 5

6 Contents Important Notes Page Proper use...7 Safety note...7 Danger...7 Explanatory Notes Scope of supply...8 Description...8 Function...8 Technical data...9 Corrosion resistance...10 Design...10 Installation UNA 26 h...11 Heat treatment of welds...12 Hand vent valve...12 Float lifting lever...12 Commissioning UNA 26 h...12 Operation Hand vent valve...13 Float lifting lever...13 Maintenance Check steam trap...13 Clean/exchange control unit... 13, 14 Torques...15 Spare Parts Spare part list

7 Important Notes Proper use Use steam trap UNA 26h (stainless steel design) only for discharge of condensate and liquids in pipes within the admissible pressure/temperature ratings. Check the chemical resistance and suitability of the steam trap for the desired application. Safety note The steam trap may only be installed by qualified staff. Qualified staff are those persons who through adequate training in engineering, the use and application of equipment in accordance with regulations concerning steam systems, and first aid & accident prevention have achieved a recognised level of competence appropriate to the installation and commissioning of this device. Danger The steam trap is under pressure when the system is operating. When loosening flanged connections or sealing plugs, hot water, steam, corrosive fluids or toxic gases may escape. This presents the risk of severe burns and scalds to the whole body or severe cases of poisoning. Installation and maintenance work should only be carried out when the system is depressurized. The trap becomes hot during operation. This presents the risk of severe burns to hands and arms. Installation and maintenance work should only be carried out at room temperatures. Sharp edges on internals present a danger of cuts to hands. Always wear industrial gloves for installation and maintenance work. 7

8 Explanatory Notes Scope of supply UNA 26h (Stainless steel design) 1 Stainless steel trap UNA 26h 1 Installation manual Description UNA 26h is a ball float trap with a rolling ball closing mechanism. The steam trap works independently of back pressure, thus ensuring universal application. UNA 26h features a body with bolted cover and a control unit. Two different control units are available: Level-dependent SIMPLEX control for cold condensate and temperaturedependent DUPLEX control with automatic deaeration for saturated steam systems. suitable for large condensate flowrates asbestos-free body gasket (graphite/ CrNi) horizontal installation Function The ball valve of the control unit is operated by the float as a function of the condensate level in the trap. The cross-sectional area (CSA) of the orifice dictates the max. flowrate when the valve is completely open. The max. admissible differential pressure of the control unit is a function of the CSA of the orifice and the density of the fluid to be discharged. There are six different closing units (orifices) available which can also be retrofitted. Float traps equipped with control units DUPLEX enable automatic temperature-dependent deaeration of saturated steam systems during start-up and in continuous operation. 8

9 Technical Data Orifices (O) O 2, PMX 2 bar (130 psi) O 4, PMX 4 bar (160 psi) O 8, PMX 8 bar (115 psi) O 13, PMX 13 bar (185 psi) O 22, PMX 22 bar (320 psi) O 32, PMX 32 bar (465 psi) Pressure/Temperature Ratings UNA 26 h stainless steel design, PN 40 Max. service pressure [barg] PMA [psig] Related temperature [ C] TMA [ F] Max. differential pressure (inlet pressure minus outlet pressure) PMX 32 [barg]/465 [psig] 9

10 Explanatory Notes continued Corrosion Resistance When used for its intended purpose the safe functioning of the steam trap will not be impaired by corrosion. Design The trap body must not be subjected to sharp increases in pressure. Welds and flanges of the trap are designed to withstand dynamic loading (bending and alternating stress). The dimensional allowances for corrosion reflect the latest state of technology. 10

11 Installation UNA 26h (Stainless Steel Design) The ball float trap may only be installed in horizontal pipelines. Flanged Traps 1. Take care of correct position of installation. Name plate B must always be on top. 2. Take care of flow direction. The flow arrow is on the trap body and on the name plate. 3. Remove plastic plugs. They are only used as transit protection. 4. Clean seating surfaces of both flanges. 5. Install steam trap. Screwed-Socket Traps 1. Take care of correct position of installation. Name plate B must always be on top. 2. Take care of flow direction. The flow arrow is on the trap body and on the name plate. 3. Remove plastic plugs. They are only used as transit protection. 4. Clean threads of screwed sockets. 5. Install steam trap. Socket-Weld Traps 1. Take care of correct position of installation. Name plate B must always be on top. 2. Take care of flow direction. The flow arrow is on the trap body and on the name plate. 3. Remove plastic plugs. They are only used as transit protection. 4. Clean socket-weld ends. 5. Arc-weld trap only manually (welding process 111 and 141 in accordance with DIN EN 24063). 11

12 Installation continued Attention Only qualified welders certified e. g. according to DIN EN 287 may weld the steam trap into pressurized lines. Heat treatment of welds A subsequent heat treatment of the welds is not required. Hand vent valve 1. Remove plug H. 2. Insert gasket F, fit hand vent valve E in place and tighten with a torque of 75 Nm. 3. Close the hand vent valve. Tools Spanner A.F. 17 mm to DIN 3113, form B Torque spanner Nm, to DIN ISO 6789 Float-lifting lever (optional accessory) 1. Remove plug H. 2. Insert gasket F and fit float-lifting lever I in place. Install handle for float-lifting lever and keep it in the horizontal position. Tighten with a torque of 75 Nm. Tools Spanner A.F. 17 mm to DIN 3113, form B Torque spanner Nm, to DIN ISO 6789 Commissioning Make sure that all flanged connections, the hand vent valve and the float lifting lever are firmly fixed to the trap, maintaining a tight, leakproof joint. 12

13 Operation Hand vent valve 1. Take heed of the note Danger on page Open the hand vent valve if necessary. 3. Close hand vent valve firmly after the venting process. Float lifting lever 1. Take heed of the note Danger on page Attach handle to float-lifting lever I, Fig Open the valve by turning the float-lifting lever I according to the direction arrow on the cover J. 4. Close the valve using the float-lifting lever and remove the handle. Maintenance GESTRA steam traps type UNA 26h do not require any special maintenance. However, if used in new installations which have not been rinsed it may be necessary to check and clean the trap. Check steam trap You can check the trap UNA 26h for steam loss during operation using the ultrasonic measuring unit VAPOPHONE or the test unit TRAPtest. In case of steam loss clean the trap and/or replace the control unit or orifice (closing unit). Clean/exchange control unit 1. Take heed of the note Danger on page Undo the body screws A or hexagon nuts P. Remove cover J from body O. 3. Unscrew socket head screws K, remove control unit C or G and seat L. 4. Replace control unit C or G and seat L in case of visible signs of wear or damage. 5. Clean body, internals and all gasket surfaces. 6. Apply heat-resistant lubricant to all threads and the seating surfaces of the closing unit and cover (use for instance WINIX 2150). 7. Insert seat L, attach control unit C or G and tighten screws K alternately with a torque of 10 Nm (DN 40 and 50 mm) or 5 Nm (DN mm). 8. Insert a new body gasket D. 9. Put cover onto the body. Tighten body screws A or hexagon nuts P alternately in several steps to the torque indicated in the table on page 15. Tools Spanner A. F. 17, 19, 22 and 24 mm to DIN 3113, form B. Allen key A. F. 5, 6, 10 mm to ISO 2936 Torque spanner Nm, Nm; DIN ISO

14 Maintenance Attention Do not change the factory setting of the bellows (thermostatic element). In case of inadvertant misadjustment restore the factory setting. When the float ball is pushed right down the dimension X (length of bellows) should be as follows: DN mm (½ 1") control unit up to 13 bar 1 = 34.5 mm DN mm (½ 1") control unit up to 32 bar 1 = 32 mm DN mm (1½ + 2"), 1 = 51.5 mm 1 14

15 Torques Item Steam trap Torque [Nm] E H I K K A P UNA 26 h, DN (½ 2") 140 UNA 26 h, DN (½ 1") 5 UNA 26 h, DN (1½ + 2") 10 UNA 26 h, DN (½ 1") 60 UNA 26 h, DN (1½ 2") 115 All torques indicated in the table are based at 20 C (room temperature). 15

16 Spare Parts Spare part list Item Designation Ref. no. Ref. no. DN DN (½ 1") (1½ 2") F M Gasket 17 x 23 mm Seat gasket*) (graphite/crni) C M D K Control unit SIMPLEX, complete, without seat G M D K Control unit DUPLEX up to 13 barg complete, without seat G M D K Control unit DUPLEX, above 13 barg complete, without seat D Body gasket*) (graphite/crni) L M K Seat, complete, Orifice without control unit Orifice Orifice Orifice Orifice Orifice *) Minimum order quantity 20 items. Contact your local dealer for smaller quantities. 16

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