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WIKA · Pressure measurement · Family CV

Check valve

Check valve for preventing backflow of gases or liquids in measuring circuits, suitable for oil and gas, chemical, petrochemical, and power plant applications.
Range
0…690 bar
NORSOK M-630API 598BS6755ISO 5208NACE MR0175 / ISO 15156EN 10204NACE MR0103NACE MR0175MSS SP-61DIN EN 12266-1EN 10204 3.1NACE MR0175/ISO 15156
Price
On request
Depends on configuration
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Description

The model CV check valves have been developed for the requirements of the process industry. The wetted parts are suited specifically for applications with natural gas and aggressive fluids, but also for water and hydraulic oil.

The simple and robust design, with a safety factor of 4:1, enables model CV check valves a wide spectrum of use. The valve design and the high-quality sealing materials ensure high durability and tightness.

Special features

  • Safety factor 4:1 for pressurised parts
  • One-piece, robust case construction prevents leaks
  • High repeatability and bubble-tight sealing through self-centring piston
  • Redundant sealing with O-ring and metal cone
  • Leak-tested tightness in accordance with BS 6755 / ISO 5208 leakage rate A
Identification
ModelCV
SubcategoryCheck valve
Measuring range
Pressure ranges0…690 bar · 0…10000 psi · 1.38…690 bar · 20…10000 psi
Process conditions
Process connection
Compression fitting with ferruleG 1/4G 3/8G 1/2G 3/4G 11/4 NPT3/8 NPT1/2 NPT3/4 NPT1 NPTNPT 1/4NPT 3/8NPT 1/2NPT 3/4NPT 1GNPT
Process temperature−55…+210 °C
Materials
Case materialStainless steel 316L, Duplex F51 (1.4462), Super Duplex F55 (1.4501), Hastelloy C276 (2.4819), Monel 400 (2.4360), Stainless steel 6Mo (1.4547), Alloy 625 (2.4856), Alloy 825 (2.4858)
Wetted parts materialStainless steel 316L, Duplex F51 (1.4462), Super Duplex F55 (1.4501), Hastelloy C276 (2.4819), Monel 400 (2.4360), Stainless steel 6Mo (1.4547), Alloy 625 (2.4856), Alloy 825 (2.4858), AISI 302 (1.4310), Inconel X-750
Sealing materialNBR, FKM, PTFE
Operating environment
Weight0.2 kg
Certifications and approvals
Certifications
NORSOK M-630API 598BS6755ISO 5208NACE MR0175 / ISO 15156EN 10204NACE MR0103NACE MR0175MSS SP-61DIN EN 12266-1EN 10204 3.1
Additional details
Datasheet languagesEN
Tables from datasheet
Model CV
Standards used
Design■ ASME B16.34, valves - flanged, threaded and welding end ■ MSS SP-99, valves for measuring instruments ■ ASME B1.20.1, pipe threads, general purpose (inch)
Tests■ API 598, valve inspection and testing ■ ISO 5208, pressure testing of metallic valves with leakage rate A ■ MSS SP-61, pressure testing of valves ■ DIN EN 12266-1, pressure tests, test procedures and acceptance criteria for industrial valves
Material requirements■ NACE MR0175 / ISO 15156, use in H₂S-containing environments in oil and gas production ■ NORSOK M-630, specification for use in pipelines (Norway)
MarkingASME B16.34, valves - flanged, threaded and welding end
Nominal pressure10,000 psi [690 bar]
Nominal width (DN)■ ¼" ■ 3/8" ■ ½" ■ ¾" ■ 1"
Valve bore size■ 5 mm[0.197 in] ■ 6 mm[0.236 in] ■ 10 mm[0.394 in]
Pressure-temperature limits (for diagram, see page 5)The limits for operating pressure and temperature depend on the version and the sealing material.
Connection type■ Threaded connection per ISO 228-1, codeG ■ Threaded connection per ANSI / ASME B1.20.1, code NPT ■ Compression fitting with ferrule
Cracking pressure20 psi [1.38 bar]±30%
Features■ Sealing through self-centring piston ■ Bubble-tight shut-off ■ Flow direction marked on valve body ■ Hydrostatically tested ■ 100 %material traceability for wetted parts ■ Tight tolerances and the guided spring prevent the piston from jamming or seizing ■ Resistance against explosive decompression (AED sealing) ■ Other specification for cracking pressure (option)
Materials
Wetted parts
Valve body and fittings, piston■ Stainless steel 316L 1) ■ Duplex F51 (1.4462) ■ Super Duplex F55 (1.4501) ■ Hastelloy C276 (2.4819) ■ Monel 400 (2.4360) ■ Stainless steel 6Mo (1.4547) ■ Alloy 625 (2.4856) ■ Alloy 825 (2.4858)
Spring 1)■ AISI 302 (1.4310) ■ Inconel X-750
Sealing 2)■ NBR, temperature range: -55 ...+120 °C [-67 ...+248 °F] ■ FKM 3) , temperature range: -55 ...+180 °C [-67 ...+356 °F] ■ PTFE, temperature range: -55 ...+210 °C [-67 ...+410 °F]
Sealing materialMax. permissible operating pressure in bar at temperature in °CMax. permissible operating pressure in bar at temperature in °C
SealingNBR 1)690 bar at 38 °C10,000 psi at 100 °F
276 bar at 120 °C8,920 psi at 248 °F
FKM 2)690 bar at 38 °C10,000 psi at 100 °F
543 bar at 180 °C7,875 psi at 356 °F
PTFE690 bar at 38 °C10,000 psi at 100 °F
520 bar at 210 °C7,542 psi at 410 °F
LogoDescription
-PMI 1) test certificate (option) All wetted parts
View all (5)
DNDimensions in mm[in]Cv in USG/minKv inm 3 /hWeight in kg [lb]
ABBore size
1/4"59 [2.323]22.2 [0.875]5 [0.197]0.530.450.2 [0.44]
3/8"64 [2.520]22.2 [0.875]6 [0.236]0.950.820.3 [0.66]
1/2"76 [2.992]30.2 [1.187]10 [0.394]1.701.50.4 [0.88]
¾"85 [3.346]34.9 [1.375]10 [0.394]1.701.50.7 [1.54]
1"95 [3.740]44.5 [1.750]10 [0.394]1.701.51.2 [2.65]