Self-operated Pressure Regulators Type Universal Pressure Reducing Valve

Transcription

1 Self-operated Pressure Regulators Type Universal Pressure Reducing Valve ANSI version Application Pressure regulators for set points from 0.75 to 400 psi (0.05 to 28 bar) Valves in NPS ½ to 4 (DN 15 to 100) Pressure rating Class 125 to 300 (PN 16 to 40) Suitable for water, gases and vapors up to 660 F (350 C) The valve closes when the downstream pressure rises Special features Low-maintenance proportional regulator requiring no auxiliary energy Frictionless plug stem seal with stainless steel bellows Control line kit available for tapping the pressure directly at the valve body Wide set point range and easy set point adjustment over a nut Exchangeable actuator and positioning springs Spring-loaded, single-seated valve with upstream and downstream pressure balancing 1) by a stainless steel bellows Soft-seated plug for better shut-off performance Low-noise standard plug Special version with a flow divider St I or St III (NPS 1½ to 4/DN 65 to 100) for further noise level reduction (see Data Sheet T 8081 EN) All wetted parts are free of non-ferrous metal Versions Pressure reducing valve for controlling the downstream pressure p 2 to the adjusted set point. The valve closes when the downstream pressure rises. Type Standard version Type 2412 Valve Valve in NPS ½ to 4 (DN 15 to 100) With metal-seated plug Body made of either cast iron A126B, cast steel A216 WCC or cast stainless steel A351 CF8M Type 24 with EPDM rolling diaphragm and screw fitting Extended versions Pressure reducing valve for small flow rates Valve with micro-trim (C V = to 0.05/K VS = to 0.04) or special C V /K VS coefficients (reduced cross-sectional flow area) Steam pressure reducing valve with condensation chamber for steam up to 660 F (350 C) Safety pressure reducing valve with leakage line connection and seal or two diaphragms and diaphragm rupture indicator Valve with downstream packing Fig. 1 Type Universal Pressure Reducing Valve Special versions Control line kit for pressure tapping at the valve body (accessories) Internal parts made of FPM (FKM), e.g. for use with mineral oils Free of oil and grease for oxygen with NBR diaphragm EPDM diaphragm with PTFE protective foil for remote set point adjustment (autoclave control) Bellows actuator for valves NPS ½ to 4 (DN 15 to 100) Set point ranges 30 to 85 psi, 75 to 150 psi, 150 to 320 psi, 300 to 400 psi (2 to 6, 5 to 10, 10 to 22, 20 to 28 bar) Valve with flow divider St I or St III (NPS 2½ to 4/DN 65 to 100) for particularly low-noise operation with gases and vapors Version entirely made of corrosion-resistant steel 1) For C V 3/K VS 2.5: without balancing bellows Associated Information Sheet T 2500 EN Edition May 2014 Associated Data Sheet for accessories T 2595 EN Data Sheet T 25 EN

2 Seat and plug of corrosion-resistant Cr steel with PTFE soft seal (max. 440 F/220 C) With EPDM soft seal (max. 300 F/150 C) Stellited seat and plug for low-wear operation Free of lubricants for high-purity water or gas Free of oil and grease for high-purity applications Wetted plastic parts conforming to FDA regulations (max. 140 F/60 C) Principle of operation (see Fig. 2) The medium flows through the valve (1) as indicated by the arrow. The position of the valve plug (3) and the area released between the plug and seat (2) determine the flow rate. The plug stem (5) with the plug is connected to the stem (11) of the actuator (10). To control the pressure, the operating diaphragm (12) is tensioned by the positioning springs (7) and the set point adjustment nut (6) so that the valve is opened by the force of the positioning springs when it is relieved of pressure (p 1 = p 2 ). The downstream pressure p 2 to be controlled is tapped downstream of the valve and transmitted via the control line (14) to the operating diaphragm (12) where it is converted into a positioning force. This force is used to move the valve plug (3) according to the force of the positioning springs (7), which is adjustable at the set point adjustment nut (6). When the force resulting from the downstream pressure p 2 rises above the adjusted set point, the valve closes proportionally to the change in pressure. The fully balanced valves are equipped with a balancing bellows (4). The downstream pressure p 2 acts on the inside of the bellows, whereas the upstream pressure p 1 acts on the outside of the bellows. As a result, the forces produced by the upstream and downstream pressures acting on the plug are balanced. p 1 p Pillars are turned into the plane of projection with two diaphragms and diaphragm rupture indicator 25 with leakage line connection For 300 to 400 psi/20 to 28 bar For 150 to 320 psi/10 to 22 bar For 30 to 85 and 75 to 150 psi/2 to 6 and 5 to 10 bar Fig. 2.1 Type Universal Pressure Reducing Valve, sectional view 1 Valve body (Type 2412) 2 Seat (exchangeable) 3 Plug (with metal sealing) 4 Balancing bellows 5 Plug stem 6 Set point adjustment nut 7 Positioning springs 8 Bellows seal 10 Type stem 12 Operating diaphragm with diaphragm plate Control line connection G ¼ (¼ NPT adapter in accessories).1 Screw joint with restriction 14 Control line 15 Condensation chamber 16 Filler plug 20 Diaphragm 21 Diaphragm rupture indicator 25 Leakage line connection G ¼ (adapter ¼ NPT in accessories) 30 Metal bellows actuator 31 Bellows with lower part 32 Additional springs 34 Bellows stem 35 Bracket Fig. 2 Principle of operation, Type Universal Pressure Reducing Valve Metal bellows actuator Fig. 2.2 Type 24 s, various versions T 25 EN

3 Valve for small flow rates - C V 3 (K VS 2.5) - without balancing bellows Metal-seated plug with flow divider St I Fig. 3 Type Universal Pressure Reducing Valve, equipped Soft-seated plug 2 Seat 3.1 Metal-seated plug 3.2 Soft-seated plug 3.3 Flow divider Table 1 Technical data All pressures specified as gauge pressure Valve Type 2412 Pressure rating Nominal size Max. perm. diff. pressure p Temperature ranges Leakage rate acc. to ANSI/FCI 70-2 Class 125, 150 or 300 PN 16, 25 or 40 NPS ½ to 2 2½ and 3 4 DN 15 to to psi bar Valve plug Refer to T 2500 EN for pressure-temperature diagram Metal seal: max. 660 F (350 C) PTFE soft seal: max. 430 F (220 C) EPDM, FPM soft seal: max. 300 F (150 C) NBR soft seal: max. 175 F (80 C) 1) Metal seal: Leakage rate I ( 0.05 % of C V/K VS) Soft seal: Leakage rate IV ( 0.01 % of C V/K VS) with diaphragm Type 24 Set point ranges Max. perm. temperature 0.75 to 3.5 psi 1.5 to 8.5 psi 3 to 17 psi 10 to 35 psi 30 to 75 psi 65 to 145 psi 115 to 230 psi 0.05 to 0.25 bar 0.1 to 0.6 bar 0.2 to 1.2 bar 0.8 to 2.5 bar 2 to 5 bar 4.5 to 10 bar 8 to 16 bar Gases 660 F (350 C), however, max. 175 F (80 C) at the actuator 1) Liquids 300 F (150 C), with condensation chamber max. 660 F (350 C) Steam with condensation chamber max. 660 F (350 C) with bellows Type 24 Effective area 5.1 sq.in (33 cm²) 9.6 sq.in (62 cm²) Set point ranges 1) Max. 140 F (60 C) for oxygen Table 2 Materials Material number acc. to ASTM and DIN EN 150 to 320 psi (10 to 22 bar) 30 to 85 psi (2 to 6 bar) 300 to 400 psi (20 to 28 bar) 75 to 150 psi (5 to 10 bar) Valve Type 2412 Pressure rating Class 125 (PN 16) Class 150 (PN 25) Class 300 (PN 40) Class 150 (PN 25) Class 300 (PN 40) Max. perm. temperature 570 F (300 C) 660 F (350 C) 660 F (350 C) Body Cast iron A126B Cast steel A216 WCC Cast stainless steel A351 CF8M Seat CrNi steel CrNiMo steel Plug CrNi steel CrNiMo steel Guide bushing Seal for soft-seated plug Balancing bellows and bellows seal PTFE with 15 % glass fiber EPDM NBR FPM PTFE/graphite Forged stainless steel Type 24 Diaphragm cases Sheet steel DD11 (StW22) 1) Diaphragm 1) In stainless steel version, CrNi steel 2) Standard version; further details in Special versions EPDM with fabric reinforcement 2) FPM for mineral oils NBR EPDM with PTFE protective foil 3 T 25 EN

4 Table 3 Max. permissible pressure at the actuator Set point ranges with rolling diaphragm 0.75 to 3.5 psi (0.05 to 0.25 bar) 9 psi/ (0.6 bar) 1.5 to 8.5 psi (0.1 to 0.6 bar) 9 psi (0.6 bar) 3 to 17 psi (0.2 to 1.2 bar) 19 psi (1.3 bar) 10 to 35 psi (0.8 to 2.5 bar) 30 to 75 psi (2 to 5 bar) 65 to 145 psi (4.5 to 10 bar) 115 to 230 psi (8 to 16 bar) with metal bellows 30 to 85 psi (2 to 6 bar) Max. permissible pressure above the set point adjusted at the actuator 36 psi (2.5 bar) 73 psi (5 bar) 150 psi (10 bar) 150 psi (10 bar) 94 psi (6.5 bar) 75 to 150 psi (5 to 10 bar) 94 psi (6.5 bar) 150 to 320 psi (10 to 22 bar) 116 psi (8 bar) 300 to 400 psi (20 to 28 bar) 30 psi (2 bar) Table 4 Dimensions and weights Type Pressure Reducing Valve with actuator with rolling diaphragm Valve size NPS (DN) ½ (15) ¾ (20) 1 (25) 1½ (40) 2 (50) 2½ (65) 3 (80) 4 (100) Length L Height H1 Height H3 Set point ranges psi 0.75 to to to to 35 bar 0.05 to to to to to 75 2 to 5 65 to to 230 Weight 0.75 to to to to 10 8 to to to to 16 1) +10 % for Class 300 Class 125 Class 150 Class 300 inch mm inch mm inch mm inch mm inch mm Dimensions in inches and (mm) Height H 17.5 (445 mm) 19.7 (500 mm) 24.4 (620 mm) 25 (635) D = 15 (380 mm), A = 100 in² (640 cm²) 1750 N Height H 17.5 (445 mm) 19.7 (500 mm) 24.4 (620 mm) 25 (635) D = 15 (380), A = 100 in² (640 cm²) Height H 16.9 (430 mm) 19.9 (480 mm) 23.6 (600 mm) 24.4 (620) D = 11.2 (285 mm), A = 50 in² (320 cm²) Height H 16.9 (430 mm) 18.1 (485 mm) 23.8 (605 mm) 24.4 (620) D = 8.9 (225 mm), A = 25 in² (160 cm²) Height H 16.1 (410 mm) 18.3 (465 mm) 23 (585 mm) 23.6 (600) D = 6.7 (170 mm), A = 12 in² (80 cm²) Height H 16.1 (410 mm) 18.3 (465 mm) 23 (585 mm) 23.6 (600) D = 6.7 (170 mm), A = 6 in² (40 cm 2 ) Height H 16.1 (410 mm) 18.3 (465 mm) 23 (585 mm) 23.6 (600) Weight, based on Class 150, approx. kg D = 6.7 (170 mm), A = 6 in² (40 cm²) 8000 N lb kg lb kg lb kg T 25 EN

5 Dimensions (see Tables 4 and 4.1) L H3 Type Universal Pressure Reducing Valve with two diaphragms: Height H + 2 (50 mm) H H1 ØD H Type 24 with metal bellows Fig. 4 Dimensions Table 4.1 Dimensions and weights Type Pressure Reducing Valve with actuator with metal bellows Valve size NPS (DN) ½ (15) ¾ (20) 1 (25) 1½ (40) 2 (50) 2½ (65) 3 (80) 4 (100) Length L Height H1 Height H3 Set point ranges psi bar 30 to 85 2 to 6 75 to to to 400 Weight 5 to to to 28 Class 125 Class 150 Class 300 inch mm inch mm inch mm inch mm inch mm Dimensions in inches and (mm) Height H 21.7 (550 mm) 23.8 (605 mm) 28.5 (725 mm) 29.1 (740) A = 9.6 in² (62 cm²) Height H 21.7 (550 mm) 23.8 (605 mm) 28.5 (725 mm) 29.1 (740) A = 9.6 in² (62 cm²) 8000 N Height H 21.1 (535 mm) 23.2 (590 mm) 28 (710 mm) 28.5 (725) A = 5.1 in² (33 cm²) 8000 N Height H 21.1 (535 mm) 23.2 (590 mm) 28 (710 mm) 28.5 (725) A = 5.1 in² (33 cm²) Weight, based A = 9.6 in² (62 cm²) 1) +10 % for Class 300 on Class 150, approx. kg A = 5.1 in² (33 cm²) 8000 N lb kg lb kg T 25 EN

6 Table 5 C V (K VS ) coefficients and x FZ values Terms for noise level calculation according to VDMA (edition ) Valve size Standard version x FZ C V K VS 1) C V I K VS I C V III K VS III Special version x FZ With flow divider NPS DN C V K VS C V K VS C V I K VS I C V III K VS III ½ 15 ¾ ½ ½ ) For C V to 0.05/K VS to 0.04: Valve with micro-trim (NPS ½ to 2/DN 15 to 25 only) without balancing bellows Valve-specific correction terms L G For gases and vapors: Values as specified in the diagram L G [db(a)] Seat Ø DN X= p p 1 L F For liquids: L F = 10 (X F x FZ) y with X F = p and y = K p1 pv K Terms for control valve sizing according to IEC 60534, Parts 2-1 and 2-2: F L = 0.95 X T = 0.75 x FZ Acoustical valve coefficient K VS I, K VS III For installation of a flow divider St I or St III as a noise-reducing component Flow characteristic differences between valves with and valves without flow dividers do not occur until the valve has passed through approx. 80 % of its travel range. V VS Fig. 5 Diagram - L G for gases and vapors - 6 T 25 EN

7 Installation Standard installation: Install the regulator with the actuator suspended (pointing down). Install the horizontal pipeline with a slight downward slope on both sides of the valve for condensate drainage. Install the regulator with the direction of flow matching the arrow on the valve body. Adapt the control line (not included in the scope of delivery) to the conditions on site. A control line kit for pressure tapping directly at the valve body is available on request (accessories). Refer to EB 2512 EN for further details on installation. Type Control line directly connected to the valve Type Control line kit and condensation chamber Accessories Included in the scope of delivery: Screw joint with restriction for connection of 3 8" control line Additional accessories that can be ordered separately: Adapter G ¼ on ¼ NPT, various screw fittings Control line kit - optionally with or without condensation chamber - for direct attachment to the valve and actuator (pressure tapped directly at the valve body, for set points 12 psi ( 0.8 bar). Condensation chamber for steam condensation and protection of the operating diaphragm against extreme temperatures. This chamber is necessary for steam and liquids above 300 F (150 C). Detailed information on accessories can be found in Data Sheet T 2595 EN. Ordering text Type Universal Pressure Reducing Valve Extended version... Nominal size NPS (DN)... Body material... Class (PN)... C V coefficient (K VS ) Set point range... psi (bar) Optionally, accessories... (see T 2595 EN) Optionally, special version... Specifications subject to change without notice 7 T 25 EN

8 T 25 EN