Dual Station Safety Valve Calibration Test Bench

The integrated mature hydraulic system delivers strong clamping force, ensuring no displacement or pressure leakage during testing, making it ideal for large-size safety valves. The wide adjustable pressure range, maximum test pressure, and clamping stroke can be customized to match various specifications of safety valves. It complies with GB/T 12243 and API 527 international inspection standards and is widely used for factory outgoing QC inspection and periodic calibration of industrial safety valves.

The Dual Station Safety Valve Calibration Test Bench is a comprehensive testing solution specifically engineered for flange-connected and thread-connected spring-loaded safety relief valves, delivering shell strength testing, sealing performance verification, and opening pressure calibration across two independent workstations. The following are its key specifications and capabilities:

1.Valve types tested: Flange-connected safety valves and thread-connected spring-loaded safety relief valves.

2.Clamping method: Hydraulic cylinder axial end-face clamping structure, compressing both ends of the safety valve flange with steplessly adjustable force, ensuring minimal external interference and uniform stress on the valve body.

3.Sealing and observation design: O-ring or flat gasket sealing between valve flange and blind plate; front observation window reserved on each station to intuitively check tightness status and accurately locate leakage points during calibration.

4.Test media: High-pressure water for hydrostatic tests; low-pressure and high-pressure gas (air or nitrogen, with optional gas booster unit per station or shared).

5.Completed test items per station: 1.5 times rated pressure hydrostatic shell strength test; 1.1 times rated pressure high-pressure water seal test; 4 to 7 bar low-pressure air tightness test; opening pressure calibration and setting test; reseating pressure detection test.

6.Left workstation specifications: Test range DN15 to DN150 (see pressure table); structural length 100 to 350 mm (customizable); flange diameter 80 to 350 mm; clamping disc spacing 150 to 400 mm adjustable; 3 clamping cylinders of 110 mm bore with 60 mm piston rods; maximum clamping force 50 tons.

7.Right workstation specifications: Test range DN150 to DN300 (see pressure table); structural length 200 to 550 mm (customizable); flange diameter 200 to 520 mm; clamping disc spacing 300 to 550 mm adjustable; 4 clamping cylinders of 140 mm bore with 70 mm piston rods; maximum clamping force 90 tons.

In summary, the Dual Station Safety Valve Calibration Test Bench combines dual-workstation flexibility with powerful hydraulic clamping, end-face sealing with direct observation windows, and comprehensive test coverage from hydrostatic shell testing to opening pressure setting and reseating verification. It meets API 527 and GB/T 12243 standards, making it an ideal choice for valve manufacturers, district heating networks, oil and gas, mining and metallurgy, MRO workshops, incoming quality control for large end-users, and third-party testing agencies that require fast, precise, and reliable safety valve calibration and inspection.

Features

1.Dual workstations cover DN15 to DN150 and DN150 to DN300, with small sizes up to PN420 pressure class. This is unlike single‑range units and is proven by 50‑ton and 90‑ton clamping forces.

2.Hydraulic clamping jaws press evenly against the flange end faces with adjustable force, minimizing external stress. This ensures realistic test results through a balanced multi‑cylinder design.

3.End‑face O‑ring or gasket sealing makes leak points directly visible through the front observation windows. This cuts fault diagnosis time by about 50% compared to conventional blind seals.

4.The machine supports both hydrostatic tests at 1.5× and 1.1× rated pressure, low‑pressure air tests at 4‑7 bar, as well as opening pressure setting and reseating verification. One machine performs shell strength, water seal, air tightness, and calibration tests, meeting API 527 and GB/T 12243 standards.

5.Adjustable jaw span from 150 to 550 millimeters fits lengths from 100 to 550 millimeters and flanges up to 520 millimeters in diameter. This enables changeover in minutes, unlike fixed‑fixture types.

Applications for : FAT in Valve Manufacturers,District Heating Networks,Oil & Gas Industry,Mining & Metallurgy,MRO Workshops,IQC in Large Industrial End-Users,Third-Party Testing Agencies

Technical Specifications Table

Stress Test Scope Table（MPa）

FAQ

1.Are you a trading company or a manufacturer?

We are Wenzhou Yufeng Valve Machinery Manufacturer, a direct factory specializing in the R&D and production of industrial valve test benches and calibration equipment, including this dual station safety valve model.

2.What is your MOQ for this dual station safety valve test bench?

Our MOQ is just 1 set. We highly welcome small trial orders as well as bulk procurement for large B2B projects.

3.What quality certifications do your safety valve test benches have?

Our equipment is manufactured under strict quality control and complies with GB/T 12243 and API 527 international inspection standards. CE, ISO, and other certifications can be provided upon request.

4.Can your equipment test GOST standard safety valves?

Absolutely. Thanks to our extensive experience in Russia and Central Asia, our machines are fully compatible with GOST standards, as well as standard API, DIN, and GB safety valves.

5.Do you support OEM/ODM customized services for this test bench?

Yes, we provide tailored solutions. We can customize the maximum test pressure, clamping dimensions, face-to-face length range, gas booster system, and control configurations based on your specific safety valve types and calibration requirements.

6.What is the maximum gas calibration pressure your system can achieve?

The left workstation supports gas calibration pressure up to 32.0 MPa (for DN15 to DN25 sizes), while the right workstation pressure capacity depends on the valve size. Please refer to the pressure range table for detailed grading.

7.Can the opening pressure and reseating pressure be accurately set and detected?

Yes. Each station is designed to perform full opening pressure calibration and setting tests, as well as reseating pressure detection tests, meeting both API 527 and GB/T 12243 requirements with high precision.

8.What is the standard lead time for this dual station safety valve test bench?

For standard configurations, lead time is typically 21 to 30 days. Customized models may take 30 to 35 days depending on design complexity and optional features like gas booster units.

9.What payment terms do you usually accept?

We usually accept T/T with a 30% deposit and 70% balance before shipment. L/C at sight is also acceptable for larger corporate orders.

10.What information should I provide to get an accurate quotation quickly?

Please share your safety valve details: valve type, connection ends (flanged or threaded), size range (DN), nominal pressure rating (PN), structural length (face-to-face), and any special calibration requirements. Our engineers will send a tailored technical proposal and quotation within 24 hours.