DK-Lok VH36 Series High Pressure Check Valve, 3/8" Tube OD x 3/8" Tube OD, Stainless Steel, Max Pressure 6000 psi (413 bar), 3 psi Cracking Pressure, VH36B-D-6T-3-S

Part Number : VH36B-D-6T-3-S

Brand :
DK-Lok

High pressure DK-Lok VH36 series stainless steel check valve with 3/8" tube OD connections, 6000 psi rating and low 3 psi cracking pressure for critical instrumentation and process lines.

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KWD 25.000

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Description
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Description

The DK-Lok VH36B-D-6T-3-S is a compact high pressure in-line check valve from the VH36 series, engineered to prevent reverse flow in demanding liquid and gas systems. It features 3/8" DK-Lok tube OD connections on both ends with a stainless steel 316 body, FKM (Viton) seal and a spring-loaded poppet for bubble-tight shutoff at pressures up to 6000 psi. The “-3-” spring option provides a nominal 3 psi cracking pressure, allowing the valve to open at very low differential pressure while still protecting downstream instruments, pumps and regulators from back-flow. With a Cv of approximately 1.8 and a body length around 69.9 mm, this VH36 check valve is ideal for space-constrained hydraulic, compressed gas and instrumentation tubing installations.

Key Features

• High pressure rating: designed for working pressures up to 6000 psi in compatible tubing systems.

• Stainless steel 316 body: corrosion-resistant construction suitable for aggressive industrial media and harsh environments.

• 3/8" DK-Lok tube OD x 3/8" DK-Lok tube OD: in-line configuration for direct connection to DK-Lok stainless tubing without separate adapters.

• Spring-loaded poppet check valve: ensures one-direction flow with bubble-tight shutoff to protect sensitive downstream equipment.

• Low 3 psi cracking pressure: “-3-” spring option allows easy opening at small differential pressures while preventing unwanted reverse flow.

• FKM (Viton) elastomer seal: standard seal material offering good chemical resistance and elevated temperature capability.

• Compact body with Cv 1.8: balances high pressure capability with good flow performance in 3/8" tube lines.

• Precision machined components: metal-to-metal seating with elastomer seal and backup ring for reliable, repeatable operation.

Applications

• Instrument and impulse lines in oil & gas, petrochemical and refinery plants where back-flow could disturb measurement accuracy.

• High pressure hydraulic circuits on pump discharge, actuator lines and test benches requiring one-direction flow protection.

• Compressed gas and utility lines handling nitrogen, natural gas, fuel gas or dry air in stainless 3/8" tubing.

• Process skids and control panels for chemical injection, sampling and purge systems where a compact in-line check valve is required.

• General industrial and power generation systems that need reliable non-return valves in high pressure stainless steel piping or tubing networks.

Downloads

DK-LOk Datasheet VH36B-D-6T-S.pdf

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DK-Lok Check Valves.pdf

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Specifications

Series
VH36 Series High Pressure Check Valves
Valve Type
In-line spring-loaded check valve, uni-directional flow
Connection Size & Type
3/8" DK-Lok tube OD x 3/8" DK-Lok tube OD
Maximum Working Pressure
6000 psi (approx. 413 bar)
Nominal Cracking Pressure
3 psi
Flow Coefficient (Cv)
1.8
Body Material
Stainless steel 316
Seal material
The choice mostly depends on chemical resistance, temperature and pressure ratings. Use our chemical resistance chart to search for compatibility with specific substances.
FKM (Viton) elastomer
Temperature Range
–10 °C to +204 °C (–14 °F to +400 °F)

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