Release Valve for Gas Lift Cylinders | Safety Component

Product Specifications

Technical details and manufacturing context for Release Valve

Definition

The release valve is a critical safety component within a gas lift cylinder system, designed to automatically or manually vent excess gas pressure to prevent over-pressurization and potential failure of the cylinder or connected equipment. It ensures operational safety and system integrity. This valve is typically installed on the cylinder head or body and is available in brass or stainless steel (SS316) construction, with elastomer seals (FKM) suitable for non-corrosive gases or hydraulic oil. The operating pressure range is 1.0–1.6 MPa, with a cracking pressure set point of 0.8–1.2 MPa. Flow capacity is 50–200 L/min at a differential pressure of 0.1 MPa. Connection sizes range from 1/4 to 1 inch G thread (ISO 228-1). The temperature range is -20 to 80°C, limited by the elastomer seal. Weight varies from 0.5 to 2.5 kg depending on size. Leakage rate is ≤0.1 mL/min at 1.1 times set pressure. Pressure setting tolerance is ±5% of set pressure, and repeatability is ±2%. These values are directory reference ranges and must be confirmed for the specific model and application with the legal manufacturer or supplier. The valve operates by opening when internal gas pressure exceeds the predetermined set point, allowing gas to escape until pressure normalizes. It may be spring-loaded, pilot-operated, or manually actuated, and then reseals automatically or manually once safe pressure is restored. Regular inspection and testing are recommended to ensure proper function. If the valve fails to reseat or leaks excessively, it should be replaced. Always verify model-specific parameters and standards with the manufacturer before installation.

Working Principle

The release valve operates by sensing the internal gas pressure within the gas lift cylinder. When the pressure exceeds a predetermined set point (cracking pressure), the valve opens, allowing gas to escape through the outlet. This reduces the pressure until it falls below the set point, at which time the valve reseats, either automatically via a spring mechanism or manually. The valve may be spring-loaded, pilot-operated, or manually actuated, depending on the design. The spring-loaded type uses a spring to hold the valve closed until the gas pressure overcomes the spring force. Pilot-operated valves use a small pilot valve to control the main valve, allowing for precise pressure control. Manual valves require an operator to open or close them. Once the pressure normalizes, the valve reseals to prevent further gas loss. This cycle ensures the cylinder and connected equipment are protected from over-pressurization.

Common Materials

Brass, Stainless Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Operating Pressure	1.0–1.6 MPa	Below 1.0 MPa the seat load is insufficient
Cracking Pressure	0.8–1.2 MPa	Set point for pressure release
Flow Capacity	50–200 L/min	At ΔP 0.1 MPa
Connection Size	1/4–1 inch	G threadISO 228-1
Temperature Range	-20–80 °C	Elastomer seal limits
Body Material	316 SS	Corrosion resistanceASTM A276
Seal Material	FKM	Oil and temperature resistanceASTM D2000
Weight	0.5–2.5 kg	Depends on size
Leakage Rate	≤0.1 mL/min	At 1.1× set pressureISO 5208
Pressure Setting Tolerance	±5 %	Of set pressure
Repeatability	±2 %	Of set pressure
Media	N2/Oil	Non-corrosive gases or hydraulic oil

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Valve Body
Houses internal components and provides connection points.

Material: Brass or Stainless Steel
Spring Part
Applies force to keep the valve closed until set pressure is exceeded.

Material: Spring Steel
Seal/Diaphragm Part
Creates a pressure-tight seal when the valve is closed.

Material: Nitrile Rubber or PTFE
Pilot Valve Optional
Controls the main valve for tighter set-pressure accuracy, on pilot-operated versions.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Gas Lift Cylinder

View system integration details

Manufacturers of Release Valve

8 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Neway Valve (Suzhou) Co., Ltd.

Suzhou, Jiangsu, CN

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