Definition of Internal thread high-pressure check valve

The Internal thread high-pressure check valve is developed to meet the needs of the process industry. Its wetted parts are particularly suitable for natural gas and corrosive fluids, and also applicable to water and hydraulic oil.

The simple and robust design with a 4:1 safety factor enables the wide application of the CV-type check valve. The valve's design and high-quality sealing materials ensure high durability and sealing performance.

The sealing element (piston) is a dual sealing system composed of an elastic O-ring and a metal cone. Under backpressure conditions, both the sealing surfaces of the soft O-ring and the metal cone can prevent the medium from flowing backward. The principle of dual sealing ensures reliable sealing performance.

Structural Features of Internal thread high-pressure check valve

The safety factor of the pressure-bearing components is 4:1

The integrated and robust housing structure prevents leakage

High repeatability and sealing performance are achieved through the self-centering piston

Redundant sealing with O-ring and metal cone

Applications of Internal thread high-pressure check valve

Oil and gas industry, chemical and petrochemical industry, power plants

Preventing the backflow of gas or liquid in measurement circuits

Can be used in sampling systems, actuator control, test benches, and hydraulic power stations

Technical Parameters of Internal thread high-pressure check valve

Specifications according to data sheet：AC 09.29

Medium temperature：max. +120 °C [+248 °F] - NBR

Medium temperature：max. +180 °C [+356 °F] - FKM

Medium temperature：max. +210°C [+410°F] - PTFE

Medium temperature：min. -55 °C [-67 °F]

Body material：other materials also available on request

Design type：Threaded/Threaded

Pressure rating：10000 PSI - 690 bar

Material body：        Stainless steel 316/316L - 1.4401/1.4404 - S31600/S31603

Cracking pressure：1.38 bar [20 PSI] ± 30%

Certificates accessory：NACE MR0175 Sour Gas Service & Inspection certificate 3.1, EN 10204, all wetted parts material

Selection Reference of Internal thread high-pressure check valve

Pressure: Determine the operating pressure and pressure resistance level

Medium: Identify the fluid medium

Cracking pressure: Minimum cracking pressure

Sealing method selection: Soft sealing or hard sealing

Connection specification: Standard for internal thread connection

Material details: Valve body material and sealing material

Additional functions: Select models with pressure gauge interface, anti-cavitation structure or detachable valve cover according to requirements, to facilitate system maintenance and pressure monitoring