PV4 and PV6 Piston Valves
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- Richard McGee
- 5 years ago
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1 Description The and are piston isolation valves that have been designed for use on steam, condensate and other liquid sytems. Available types: and Piston ¾" shown Screwed, butt weld and socket weld connections Carbon steel body / bonnet and stainless steel internals Stainless steel body / bonnet and stainless steel internals Standards This product fully complies with the requirements of the European Pressure Equipment Directive 97 / 23 / EC. Certification This product is available with certification to EN Note: All certification / inspection requirements must be stated at the time of order placement. Sizes and pipe connections ½", ¾", 1", and 1¼" NPT to (ASME B1.20.1) or BSP (BS21 / DIN 2999) Butt welded ends to EN 12627:1999BW - ASME B16.25 Socket weld ends to ASME B Cv Values Size ½" ¾" 1" 1¼" Cv (US) For conversion: Kv = Cv(US) Cv (US) = Kv x Local regulation may restrict the use of this product below the conditions quoted. Limiting conditions refer to standard connections only. In the interests of development and improvement of the product, we reserve the right to change the specification. 852
2 Pressure / Temperature Limits Temperature C The product must not be used in this region. and Piston Pressure psig A Steam 392 saturation 100 curve B Pressure bar g Temperature F A - B Body design conditions API Class 800 PMA Maximum allowable pressure F (136.2 bar 38 C) TMA Maximum allowable temperature psig ( bar g) Minimum allowable temperature PMO Maximum operating pressure for saturated steam service 1508 psig (104 bar g) TMO Maximum operating temperature psig ( bar g) Minimum operating temperature Note: For lower operating temperatures consult Spirax Sarco Designed for a maximum cold hydraulic test pressure of 2963 psig (204.3 bar g) Temperature C A Pressure psig Steam saturation curve B Pressure bar g Temperature F The product must not be used in this region. A - B Body design conditions API Class 800 PMA Maximum allowable pressure F (132.4 bar 38 C) TMA Maximum allowable temperature psig ( bar g) Minimum allowable temperature PMO Maximum operating pressure for saturated steam service 1218 psig (84 bar g) TMO Maximum operating temperature psig ( bar g) Minimum operating temperature Note: For lower operating temperatures consult Spirax Sarco Designed for a maximum cold hydraulic test pressure of 2879 psig (198.5 bar g) 853
3 and Piston Materials No. Part Material Connection 1 Body 2 Bonnet 3 Lower sealing rings 4 Upper sealing rings 5 Lantern bush 6 Piston Carbon steel Stainless steel Carbon steel Stainless steel ½" (DN15) Graphite laminate / Stainless steel ¾" to 1¼" (DN20 to DN32) Stainless steel ½" (DN15) Graphite laminate / Stainless steel ¾" to 1¼" (DN20 to DN32) Stainless steel ASTM A105N EN / AISI 316 ASTM A105W EN / AISI 316 Stainless steel EN / AISI 431 Stainless steel EN / AISI 316L Stainless steel EN / AISI 316 Stainless steel EN / AISI 316L 7 Handwheel Carbon steel 8 Handwheel nut Carbon steel 9 Stud bolt 10 Nut Carbon steel ASTM A193 B7 Stainless steel ASTM A193 GrB8M2 Carbon steel ASTM A194 2H Stainless steel ASTM A193 GrB8M2 11 Washer Stainless steel 12 Name-plate Stainless steel 13 Belleville washer Stainless steel 14 Blind nut Carbon steel 854
4 Dimensions / Weights approximate in inches (mm) and pounds (kg) and Piston Size A B B1 C Weight C ½" 3.3 (85) 4.0 (102) 4.6 (118) 3.7 (95) 2.6 (1.2) ¾" 3.9 (100) 5.0 (126) 5.9 (150) 3.7 (95) 3.5 (1.6) 1" 4.7 (120) 5.9 (150) 7.1 (180) 4.5 (115) 6.2 (2.8) 1¼" 5.5 (140) 6.9 (175) 8.6 (218) 5.9 (150) 9.0 (4.1) B1 B A (Screwed / Socket weld and bu tt weld) Safety Information, Installation and Maintenance For full details see the Installation and Maintenance Instructions (IM-P118-05) supplied with the product. Caution: Valve keys should not be used to operate these valves. Installation note: Install the valve in the direction of flow given by the arrow on the body. The valve can be installed in any plane but not with the handwheel below the valve body. Disposal The product is recyclable. No ecological hazard is anticipated with the disposal of this product, providing due care is taken. How to Order Example: 1 off Spirax Sarco ½" piston valve having screwed NPT connections. The valve is to be supplied with EN certification. The C v is to be
5 and Piston Spare parts Spare parts are available as indicated. No other parts are supplied as spares. Available spares Set of sealing rings 3 and 4 Bonnet assembly 2,3,4,5,6,7,8 and 11 How to order spares Always order spares by using the description given above and state the size and type of valve. Example: 1 - Bonnet assembly for a Spirax Sarco ¼" piston valve. *Not an available spare Recommended tightening torques Bolting size Torque Item Valve size No. of bolts Carbon steel body Stainless steel body lbs. ft. Nm ½" 5 /16 " - 18 UNC M8 x ¾" 5 /16 " - 18 UNC M8 x " 5 /16 " - 18 UNC M8 x ¼" ⅜" - 16 UNC ⅜" - 16 UNC Caution: the torque of the studs is calculated to optime the use of the product. An excessive torque can damage the valve internals (particulary if the product is open). The studs of valve can be retightened to extend the life of it, but only when it is closed and not more than the recommended torque. 856
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Shut-off valves Types SVA-S and SVA-L
Data sheet Shut-off valves Types SVA-S and SVA-L SVA shut-off valves are available in angleway and straightway versions and with Standard neck (SVA-S) and Long neck (SVA-L) The shut-off valves are designed
DRV4 and DRV4G Cast Steel Pressure Reducing Valves
Local regulations may restrict the use of this product to below the conditions quoted. n the interests of development and improvement of the product, we reserve the right to change the specification without
UREA SERVICE FORGED VALVES
UREA SERVICE FORGED VALVES 288 UREA SERVICE VALVES 289 UREAvalves DROP CHECK VALVE UREA SERVICE PN325 1/2 to 2 DOUGLAS CHERO DROP CHECK VALVE UREA SERVICE DROP CHECK VALVE UREA SERVICE PN325 : PN325 Drop