Valve Holding Pressure Tester 300kn Holding Pressure Full Bore Test Gb/T 13927

Valve Holding Pressure Tester 300kn Holding Pressure Full Bore Test Gb/T 13927

Product Introduction

WPT-2 achieves high precision and high efficiency in valve testing through innovative clamping structure and intelligent measurement and control technology:

• Pressing seal: 300kN hydraulic clamp (adjustable clamping force 10-300kN) is suitable for flange/wafer valves, and the sealing ring is made of wear-resistant polytetrafluoroethylene to ensure zero leakage during the test process and solve the problem of unstable sealing of traditional manual clamping.
• Full range coverage: 0-100MPa water pressure test (standard), support shell strength test (1.5PN), sealing test (1.1PN) and high-pressure air tightness test (optional gas module), suitable for all types of valves such as gate valves, ball valves, butterfly valves, etc.
• Intelligent measurement and control: 10-inch color touch screen (Chinese and English switch) one-click setting of test parameters, servo motor drives plunger pump to automatically increase pressure (rate 0-10MPa/s adjustable), pressure stability ≤±0.5% FS, avoiding manual operation errors.
• Data traceability: Built-in 32G memory, automatically records 50+ parameters such as clamping pressure, test pressure, leakage, pressure holding time, etc., supports USB/Ethernet data export, and supports PC software to generate PDF test reports (including pressure curve, qualified judgment), meeting ISO 9001 quality traceability requirements.

Product Features

• Efficient clamping design

• • Hydraulic clamping response time <5s, single valve test cycle is 40% shorter than traditional equipment, supports multi-station parallel testing (up to 4 stations), and improves batch testing efficiency.
  • Holding pressure range DN50-DN500, compatible with PN16-PN100 pressure level valves, no need to change the fixture, and automatically adjust the clamping stroke through the touch screen.

• High-precision testing

• • The pressure sensor is calibrated by CNAS (accuracy ±0.3% FS), and the clamping pressure sensor resolution is 0.1kN, ensuring that the leakage detection accuracy of the sealing test reaches 0.05mL/min (bubble method).
  • The pressure holding time can be freely set from 0 to 300 minutes, and supports dual detection modes of pressure decay method (pressure drop ≤ 0.3%) and weight method (leakage conversion).

• Safety protection

• • The tempered glass explosion-proof cabin (transmittance 95%, pressure resistance 50MPa) isolates the test area, and the leak detection sensor (accuracy 0.1ppm) monitors the environment in real time, automatically shuts down and alarms with sound and light when exceeding the standard.
  • Double overload protection (hydraulic system overflow valve + software pressure upper limit), automatic warning of motor overheating (＞75℃) and water tank water shortage ensures safe operation.
• Flexible adaptation
• • Supports flange (RF/RTJ), wafer-type, and threaded valve installation, equipped with universal conversion joints (DN50-DN500), no customized tooling required.
  • The remote control interface (RS485/Modbus) can be connected to the factory MES system to realize automatic upload and process management of test data.

International reference standards

• ASME B16.34: Valve pressure rating and test method (shell/seal test pressure, pressure holding time clauses).
• GB/T 13927: Industrial valve pressure test (leakage determination, test medium requirements).
• API 598: Valve pressure test specification (clarifies the influence of water pressure test temperature and clamping force on test results).
• ISO 5208: Industrial valve leakage test (liquid/gas leakage rate detection method).

Product use

• Valve manufacturing: Full inspection of sealing performance and shell strength before leaving the factory to ensure that PN16-PN100 valves meet the nominal pressure rating (such as batch inspection of ball valves and butterfly valves).
• Pipeline engineering: Re-inspect valve sealing before installation (such as high-pressure gate valves for natural gas pipelines and chemical corrosion-resistant valves) to avoid leakage accidents during operation.
• Quality inspection and certification: Provide third-party test reports and support compliance testing of valves such as CE, API, TS, etc.
• Scientific research and development: research on the high-pressure resistance of valve materials (such as deformation analysis of stainless steel valves under 100MPa), and sealing structure optimization testing.

Technical Parameters

Test objects and inspection items

Test objects:

• Flanged valves (gate valves, stop valves, check valves)
• Wafer valves (butterfly valves, ball valves)
• Threaded valves (small instrument valves, safety valves)
• Valve accessories (filters, flame arresters, vent valves)

Inspection items:

• Shell water pressure strength (1.5 times the nominal pressure, no deformation after 30 minutes of pressure maintenance)
• Sealing surface leakage (1.1 times the nominal pressure, 15 minutes of pressure maintenance ≤ standard value)
• Air pressure sealing (0.6MPa air pressure, 60 minutes of pressure maintenance ≤0.5%)
• Pressure sealing (comparison test of leakage under different clamping forces)
• Fatigue life test (500 cycles of pressurization, leakage change analysis)