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Piston Isolation Valves For Steam and Condensate

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Spirax Sarco, leader in products and services for steam system management, released the PV4 and PV6 piston valves for isolation purposes. The valves are available in NPT and SW versions, from ½” to 2”. Bodies are available in forged carbon steel or forged stainless steel.

These valves are designed to Class 800 and provide tight shutoff, suitable for steam, condensate and other liquid systems.

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Piston Isolation Valves For Steam and Condensate

  1. 1. 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. Isolation Valves 852 Description The PV4 and PV6 are piston isolation valves that have been designed for use on steam, condensate and other liquid sytems. Available types: Screwed, butt weld and socket weld connections PV4 Carbon steel body / bonnet and stainless steel internals PV6 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 10204 3.1. Note: All certification / inspection requirements must be stated at the time of order placement. Sizes and pipe connections ½", ¾", 1", 1¼", 1½" and 2" 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 16.11 Cv Values Screwed, socket weld and butt weld Size ½" ¾" 1" 1¼" 1½" 2" Cv (US) 3.5 5.2 9.8 16.2 23.7 37.0 For conversion: Kv = Cv(US) 1.156 Cv (US) = Kv x 1.156 PV4 and PV6 Piston Valves TI-P118-06-US 10.17 ¾" shown Mountain States Engineering and Controls Lakewood, CO USA 303-232-4100 www.mnteng.com
  2. 2. Spirax Sarco, Inc., 1150 Northpoint Blvd., Blythewood, SC 29016 • Phone: (803) 714-2000 • Fax: (803) 714-2222 Isolation Valves 853 The product must not be used in this region. A - B Screwed, socket weld and butt weld Body design conditions API Class 800 PMA Maximum allowable pressure 1975 psig @ 100°F (136.2 bar g @ 38°C) TMA Maximum allowable temperature 797°F @ 1112 psig (425°C @ 76.7 bar g) Minimum allowable temperature -20°F (-29°C) PMO Maximum operating pressure for saturated steam service 1508 psig (104 bar g) TMO Maximum operating temperature 797°F @ 1112 psig (425°C @ 76 bar g) Minimum operating temperature Note: For lower operating temperatures consult Spirax Sarco -20°F (-29°C) Designed for a maximum cold hydraulic test pressure of 2963 psig (204.3 bar g) The product must not be used in this region. A - B Screwed, socket weld and butt weld Body design conditions API Class 800 PMA Maximum allowable pressure 1920 psig @ 100°F (132.4 bar g @ 38°C) TMA Maximum allowable temperature 797°F @ 1117 psig (425°C @ 77 bar g) Minimum allowable temperature -20°F (-29°C) PMO Maximum operating pressure for saturated steam service 1218 psig (84 bar g) TMO Maximum operating temperature 797°F @ 1117 psig (425°C @ 77 bar g) Minimum operating temperature -20°F (-29°C) Note: For lower operating temperatures consult Spirax Sarco Designed for a maximum cold hydraulic test pressure of 2879 psig (198.5 bar g) PV6 Pressure / Temperature Limits PV4 TI-P118-06-US 10.17 1450 136.2 425 100 0 0 20 290 580 870 1160 1740 1975 40 60 80 100 120 140 -29 200 300 400 797 212 32 392 572 752 Temperature°C Temperature°F Pressure bar g Pressure psig Steam saturation curve A B 0 100 0 32 -29 200 300 400 425 212 392 572 752 797 20 40 60 80 100 120 132.4 140 290 580 870 1160 1450 1740 1975 Temperature°C Temperature°F Pressure bar g Pressure psig Steam saturation curve B A
  3. 3. Spirax Sarco, Inc., 1150 Northpoint Blvd., Blythewood, SC 29016 • Phone: (803) 714-2000 • Fax: (803) 714-2222 Isolation Valves 854 Materials No. Part Material Connection 1 Body PV4 Carbon steel Screwed (NPT / BSP / SW / BW) ASTM A105N PV6 Stainless steel Screwed (NPT / BSP / SW / BW) EN 1.4401 / AISI 316 2 Bonnet PV4 Carbon steel Screwed (NPT / BSP / SW / BW) ASTM A105W PV6 Stainless steel Screwed (NPT / BSP / SW / BW) EN 1.4401 / AISI 316 3 Lower sealing rings ½" (DN15) Graphite laminate / Stainless steel ¾" to 2" (DN20 to DN50) Stainless steel 4 Upper sealing rings ½" (DN15) Graphite laminate / Stainless steel ¾" to 2" (DN20 to DN50) Stainless steel 5 Lantern bush PV4 Stainless steel EN 1.4057 / AISI 431 PV6 Stainless steel EN 1.4401 / AISI 316L 6 Piston PV4 Stainless steel EN 1.4401 / AISI 316 PV6 Stainless steel EN 1.4404 / AISI 316L 7 Handwheel Carbon steel 8 Handwheel nut Carbon steel 9 Stud bolt PV4 Carbon steel ASTM A193 B7 PV6 Stainless steel ASTM A193 GrB8M2 10 Nut PV4 Carbon steel ASTM A194 2H PV6 Stainless steel ASTM A193 GrB8M2 11 Washer Stainless steel 12 Name-plate Stainless steel 13 Belleville washer Stainless steel 14 Blind nut Carbon steel 10 9 6 12 7 2 4 13 5 1 3 14 11 8 TI-P118-06-US 10.17
  4. 4. Spirax Sarco, Inc., 1150 Northpoint Blvd., Blythewood, SC 29016 • Phone: (803) 714-2000 • Fax: (803) 714-2222 Isolation Valves 855 Dimensions / Weights approximate in inches (mm) and pounds (kg) Screwed, socket weld and butt weld Size A B B1 C Weight 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) 1½" 6.3 (160) 7.7 (195) 9.3 (236) 5.9 (150) 13.2 (6.0) 2" 7.3 (185) 9.6 (245) 11.4 (290) 7.9 (200) 26.0 (11.8) 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" PV4 piston valve having screwed NPT connections. The valve is to be supplied with EN 10204 3.1 certifica- tion. The Cv is to be 3.5. TI-P118-06-US 10.17 C B B1 A (Screwed / Socket weld and bu tt weld)
  5. 5. Spirax Sarco, Inc., 1150 Northpoint Blvd., Blythewood, SC 29016 • Phone: (803) 714-2000 • Fax: (803) 714-2222 Isolation Valves 856 TI-P118-06-US 10.17 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" PV4 piston valve. Recommended tightening torques Screwed, socket weld and butt weld Item Valve size Bolting size No. of bolts Torque Carbon steel body Stainless steel body lbs. ft. Nm 10 ½" 5/16" - 18 UNC M8 x 1.25 2 8.8 12 ¾" 5/16" - 18 UNC M8 x 1.25 2 6.6 9 1" 5/16" - 18 UNC M8 x 1.25 2 6.6 9 1¼" ⅜" - 16 UNC ⅜" - 16 UNC 2 22.1 30 1½" ½" - 13 UNC ½" - 13 UNC 2 25.8 35 2" ⅝" - 11 UNC ⅝" - 11 UNC 2 51.6 70 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. *Not an available spare

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