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Surface safety

    Surface safety

    The Surface Safety System, commonly known as SSV or Surface Safety Valve, is a critical wellhead emergency shutdown safety device widely applied in onshore and offshore oil and gas wells, wellhead production trees, test manifolds and surface gathering pipelines. As the core barrier of well surface safety control, this system is designed to prevent well blowouts, medium leakage and equipment damage caused by sudden overpressure, pipeline rupture, fire hazard and equipment failure. It serves as the final safety protection line for oil and gas well surface production systems, ensuring zero major...
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1. Product Description

The Surface Safety System, commonly known as SSV or Surface Safety Valve, is a critical wellhead emergency shutdown safety device widely applied in onshore and offshore oil and gas wells, wellhead production trees, test manifolds and surface gathering pipelines. As the core barrier of well surface safety control, this system is designed to prevent well blowouts, medium leakage and equipment damage caused by sudden overpressure, pipeline rupture, fire hazard and equipment failure. It serves as the final safety protection line for oil and gas well surface production systems, ensuring zero major safety accidents during long-term field operation.
The surface safety system mainly consists of hydraulic or pneumatic actuators, high-pressure safety valve body, position indicator, fusible plug fire protection assembly and emergency control unit. Different from conventional manual valves, the SSV supports automatic emergency shutdown and remote intelligent control. When the wellhead pressure exceeds the preset safe threshold or the system detects abnormal working conditions, the valve will rapidly and automatically cut off the well fluid channel within seconds. It can also realize passive shutdown through fusible elements in case of on-site fire, effectively isolating downhole pressure and blocking risk diffusion. After the fault is eliminated and the system pressure returns to normal, the device can be manually reset for normal production recovery.
Manufactured with integral forging technology and metal hard sealing structure, the surface safety system features high pressure resistance, zero leakage, fatigue resistance and excellent environmental adaptability. It can stably operate in harsh working conditions including high pressure, high salinity, hydrogen sulfide corrosion and extreme temperature changes. With compact overall structure, convenient installation and simple daily maintenance, it perfectly matches API 6A international wellhead standards. Widely used in conventional oil and gas wells, high-pressure test wells, offshore platform production wells and fracturing & cementing operation sites, it is a mandatory safety configuration for modern standardized oilfield development projects.

2. Technical Specifications & Parameters

Parameter Item
Technical Standard
Product Name
API 6A Surface Safety Valve (SSV) / Surface Safety System
Working Pressure Grade
2000PSI ~ 20000PSI (14MPa ~ 140MPa)
Nominal Size Range
1-13/16” ~ 7-1/16” Customizable
Working Temperature Range
-46℃ ~ 121℃ (K~U Temperature Class)
Drive Mode
Hydraulic / Pneumatic Remote Control
Performance Level
PR1 / PR2, PSL1~PSL4
Main Material
Carbon Steel, Alloy Steel, Stainless Steel (H2S Corrosion Resistant)
Core Function
Overpressure Auto-shutdown, Fire Shutdown, Remote Emergency Shutdown
Sealing Performance
Bidirectional Zero Leakage
Executive Standard
API 6A, ISO 9001
Application Scenarios
Onshore & Offshore Wellhead, Production Tree, Test Manifold, ESD System

3. Company Profile

Sanmen Machinery Co., Ltd. is a professional manufacturer and global exporter of oilfield wellhead safety equipment, focusing on independent R&D, precision forging production and customized matching of surface safety systems, wellhead valves, safety protection assemblies and Downhole Tools. With more than 18 years of petroleum equipment manufacturing experience, the company provides standardized and personalized well safety system solutions for global onshore and offshore oil and gas development projects.
The company is equipped with advanced CNC machining centers, integral forging production lines and professional high-pressure testing laboratories. Every SSV surface safety system undergoes strict raw material inspection, heat treatment strengthening, precision dimensional calibration, full-pressure sealing test and emergency shutdown simulation test. All products strictly comply with API 6A international standards and oilfield safety specifications, ensuring stable emergency response performance and long service life under extreme high-pressure and corrosive working conditions. Our professional R&D team supports structural optimization and parameter customization according to different well types, pressure grades and environmental requirements.
Adopting factory direct sales mode, we eliminate intermediate links and provide high-cost-performance wellhead safety equipment. Our surface safety systems have been widely exported to more than 30 countries including the Middle East, Southeast Asia, Africa and Latin America. We provide one-stop services including parameter selection, structural customization, factory pre-testing, on-site installation guidance and full lifecycle after-sales maintenance, maintaining long-term stable cooperative relations with global oilfield operators and engineering contractors.


 Frequently Asked Questions (FAQ)

Q1: What is the core function of the Surface Safety System?
A1: The SSV is the primary wellhead emergency safety device. It can automatically shut down the well quickly in case of wellhead overpressure, pipeline leakage, equipment failure and on-site fire, isolate downhole high-pressure fluid, avoid blowout and leakage risks, and protect personnel and surface equipment safety.
Q2: What drive types are available for selection?
A2: We provide two mainstream driving modes: hydraulic drive and pneumatic drive. Hydraulic SSV features stable output and suitable for ultra-high pressure wells; pneumatic SSV is environmentally friendly, flexible and more adaptable to offshore platform low-temperature and explosion-proof working environments.
Q3: Can the product adapt to H2S corrosive oilfield conditions?
A3: Yes. We support corrosion-resistant material configuration and anti-sulfur treatment. The customized SSV can adapt to hydrogen sulfide and carbon dioxide corrosive medium environments, meeting long-term safe operation requirements of high-sulfur oil and gas wells.
Q4: What certification and test reports can be provided?
A4: All products fully comply with API 6A standards and pass ISO 9001 quality certification. We can provide factory pressure test reports, NDT inspection reports, material certificates and complete export documents to support project inspection and customs clearance.
Q5: What is your delivery cycle and after-sales service?
A5: Standard models are in stock with 7–10 working days delivery. Customized products take 15–25 working days. We provide remote technical guidance, on-site installation and commissioning training, and lifelong spare parts supply to ensure stable operation of customer wellhead safety systems.


Related tags： Wellhead Protection Equipment Oilfield Safety Valves API Standard Surface Safety Valve

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Sanmon Machinery Equipments Co., Ltd. founded in 2010, is located in the beautifulcoastal city - Yantai of China. We are an integrated company for Oil & Gas Equipment ApplicantResearch, Customized Design, Order Production and Global Sales, We provide professional productsand services to the Oil and Gas Industrial Customers over 20 countries and regions. Our productscover Sucker Rod Pump Jack, Pump, Sucker rod and Accessories, Wellhead and X-mas Tree, Valves,Completion Tools, Artificial lift Equipment, Flow Control Equipment, Coil Tubing Tools, OilfieldWork Vehicles, Chemicals & Additives, Wire-line Tools, etc., and we supply Well CompletionService, Coil Tubing Work Service, snubbing service, Down-hole Pipe Cutting Work, ArtificialLifting Work, Special Tools and Vehicles Renting Service and other related services. Longcareered engineer and technicians, ISo and API strict quality control factory and excellentsales team are always our exclusive advantages.

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