API 6A Pneumatic Piston Gate Valve - Surface Safety Valve

API 6A Pneumatic Piston Gate Valve - Surface Safety Valve

Product Description

Pneumatic Piston Gate Valve | API 6A Surface Safety Valve (SSV)

Yulin Machinery's Pneumatic Piston Gate Valve is a fail-safe surface safety valve (SSV)used to automatically shut in wellhead flow during abnormal pressure or emergency conditions. Built with a piston-type actuator, segment seal design, and high-strength compression springs, it is engineered for reliable fail-close performance in onshore and offshore oilfield applications.

Key Specifications

Valve Type	Pneumatic Piston Actuated Surface Safety Valve (SSV)
Failure Mode	Fail-close
Applicable Standards	API 6A, NACE MR-01-75
Pressure/Vent Port	1/2" NPT
Available Sizes & Pressure Classes	Custom-engineered per project requirements

Send Your Requirements

How It Works

The valve operates in a fail-close configuration. During normal operation, pneumatic pressure in the actuator holds the gate open against inlet pressure. If an abnormal condition is detected, actuator pressure is released through a quick exhaust device, allowing the gate to close automatically — driven by inlet pressure on the valve stem and the compression spring force. Once conditions are normal again, the valve can be reopened by restoring pneumatic pressure to the actuator.

An optional vent port and slam-fire system can be configured to close the valve immediately in the event of gate failure.

Design Features

- Segment seal + Poly-pak design: Replaces traditional O-ring piston seals to prevent wear, misalignment, and distortion, extending actuator service life.

- Stem protection: Wear-resistant bearings separate the stem and valve rod from metal-to-metal contact, reducing twisting forces transmitted to gate and seat.

- Top-mounted seal assembly: Stem seal can be replaced without disassembling the actuator, with a rod scraper to extend service life of position indication components.

- High-strength compression springs: Industry-leading spring force ensures positive valve closure; springs ship relaxed for safe, tool-free installation.

- 360° rotatable actuator body: Bottom swivel plate allows full rotation to suit piping orientation requirements.

- Easy maintenance: Bonnet and actuator assemblies are designed for quick disassembly and field repair using standard tools (6 hex socket head cap screws).

Piston vs. Diaphragm Actuator: Which One Do You Need?

Applications

- Onshore and offshore oil & gas productionflowlines

- Automatic emergency shutdown (ESD) systems

Available Accessories

- Thermal sensitive switches

- Manual handwheel override

- Hydraulic pilots

- Position indicators

- Remote control equipment

- Quick exhaust devices

- Valve stem protectors

Frequently Asked Questions

Can the valve be customized for specific well conditions?

What standards does this valve comply with?

Request a Quote

Tell us your size, pressure rating, and application requirements — our engineers will recommend the right configuration and provide a quotation within 24 hours.

For more information, please visit our website.

Other supplier products

	Wellhead Christmas Tree Manufacturers	Wellhead Christmas Tree Manufacturers Yulin Machineryis one of the professional Wellhead Christmas Tree Manufacturers in China, specializing in de...
	API 6A Pneumatic Piston Gate Valve - Surface Safety Valve	API 6A Pneumatic Piston Gate Valve - Surface Safety Valve Product Description Pneumatic Piston Gate Valve | API 6A Surface Safety Valve (SSV) Yu...
	Surface Safety Valve (SSV) - API 6A Hydraulic Actuated Gate Valve	Surface Safety Valve (SSV) - API 6A Hydraulic Actuated Gate Valve Product Description Hydraulic Gate Valve | API 6A Surface Safety Valve (SSV) Y...
	Wellhead Casing Head	Wellhead Casing Head Description Casing-head housings are attached to the upper end of the surface casing. It isdesigned to accept hanging and pa...
	Tubing Head Spool	Tubing Head Spool Product Description Tubing headspools are attached to the top connector of casing-head housings or spools, which is used to han...

All supplier products

Same products

	Wellhead Christmas Tree Manufacturers	Seller: Yulin International Corporation	Wellhead Christmas Tree Manufacturers Yulin Machineryis one of the professional Wellhead Christm...
	Wellhead Equipment	Seller: Yulin International Corporation	Wellhead Equipment Functions of Wellhead Equipment After an oil or gas well has been drilled, i...
	Choke Valve	Seller: Yulin International Corporation	Choke Valve | High-Performance Choke Valves for Oil & Gas Production Product Description Th...
	Expanding Gate Valves	Seller: Yulin International Corporation	Expanding Gate Valves | API 6A Expanding Gate Valves for Oilfield Systems Description API 6A Ex...
	Ball Screw Gate Valves	Seller: Yulin International Corporation	Ball Screw Gate Valves | Reliable Flow Control for High-Pressure Systems Yulin wellhead ball s...