Pressure Relief Valve Test Stand

MOEORW-W600SF5 test bench is a dedicated calibration device for pressure relief valves fitted on oil-immersed power equipment. It simulates internal overpressure fault conditions of oil-type power apparatus to complete three core performance tests: opening pressure, re-seating pressure and sealing performance of pressure relief valves.

The equipment supports calibration of PRVs with four mainstream calibers: φ25, φ50, φ80 and φ130. It adopts integrated control, data acquisition and printing architecture based on CAN bus communication, with industrial touch HMI for full-process parameter visualization. Built-in multi-layer safety interlock and automatic fault shutdown logic eliminate overpressure, leakage and timeout risks during testing. All structural fasteners and core frames are manufactured with 304 stainless steel to extend service life in long-term workshop operation.

The system operates on Windows platform to realize local storage, retrieval and export of test data, equipped with embedded micro printer for on-site report output. It can sample dual groups of contact signals simultaneously to cover both contact-equipped and contact-free pressure relief valve test scenarios, delivering high-precision, traceable calibration results for transformer manufacturers, power operation and third-party testing laboratories.

Mechanical Cabinet Structure
The outer enclosure is cold-rolled steel bent and formed as an integrated cabinet. Six movable casters and eight height-adjustable support jacks are mounted on the base for flexible site transfer and horizontal leveling. Casters are locked by pressing the buckle handle; pulling up the buckle unlocks wheels for movement. Independent sealed test tank with built-in overpressure safety valve to prevent abnormal pressure surge. Quick-change flange adapters for four standard valve calibers realize rapid clamping without extra machining.
 

Electrical & Control System
1.Main power circuit supports dual voltage input AC220V/380V with total power 8500W; matched air compressor adopts independent AC380V power supply.
2.All electric actuators and control modules adopt dual-power AC220V/DC24V design for stable signal output and anti-interference performance.
3.Control system runs on Windows industrial operating system, with embedded data storage module and built-in thermal micro printer.
4.Separate grounding terminal is reserved; the grounding wire must be routed independently without sharing grounding points with high-current loads.

Hardware & Structural Design
1.Highly integrated all-in-one design of control, display and printing modules, reducing scattered accessories and lowering daily management loss risks.
2.Wearing parts adopt universal standard industrial components to cut after-sales maintenance and replacement cost.
3.Key load-bearing structure and all fasteners use 304 stainless steel, resisting workshop moisture and mild corrosive atmosphere.
4.Independent pressure test tank equipped with exhaust solenoid valve and mechanical safety relief valve for dual physical overpressure protection.
5.Mobile base with locking casters and leveling jacks, convenient for workshop layout adjustment and fixed long-term operation.
 

High-Speed Data Acquisition Performance
1.Self-developed CAN bus communication between upper computer and lower acquisition unit, shortening data response delay and improving long-term continuous sampling stability.
2.Real-time dynamic curve plotting of tank pressure, capturing peak opening pressure, re-seating pressure and pressure change gradient of PRV sealing surface accurately.
3.Dual-channel contact signal sampling design: two groups of opening/re-seating contact terminals can collect signals in one test cycle, compatible with both signal-equipped and contactless pressure relief valves.
 

Intelligent Human-Machine Interaction & Safety Protection
1.Full-color touch screen with pop-up numeric keypad for one-click setting of test times, sealing pressure, holding duration and valve basic information.
2.Multi-layer logic safety protection system: automatic rapid pressure relief and test termination under overpressure, overtime and leakage faults.
3.Real-time monitoring of actuators and pressure sensors; system pops fault prompt dialogue and halts operation once abnormal components are detected.
4.Manual emergency stop function available during full test process to terminate operation instantly.
 

Data Management & Output Value
1.Windows-based control system supports long-term storage, retrieval and classification of historical test records, compatible with third-party industrial management software for data docking.
2.Three optional data processing modes after test completion: direct print of test slip, default directory automatic saving, custom renaming and designated path storage.
3.Complete test report records valve manufacturer, model, serial number, caliber, test type, cycle times, pressure curve and time parameters for full test traceability.

1.Factory incoming inspection & finished product calibration for oil-immersed distribution transformers, power transformers and oil-type reactors.
2.R&D performance verification of new pressure relief valve products from valve manufacturers.
3.Third-party electrical testing laboratories for routine PRV calibration service.
4.Power grid operation and maintenance department for regular performance inspection of in-service transformer pressure relief valves.
5.High-voltage electrical equipment manufacturing enterprises for quality control of complete sets of oil-filled power apparatus.

1.Main test bench host ×1
2.φ25 / φ50 / φ80 / φ130 interchangeable clamping flanges ×1 set
3.Signal crocodile clip connecting wires ×2 groups
4.Equipment grounding cable ×1
5.Operation manual & factory calibration certificate ×1 set
6.Thermal printing paper roll ×2
7.Maintenance tool set for structural fastening ×1
8.Waterproof dust cover for long-term storage ×1

1.Only authorized factory technicians are permitted to disassemble internal components for overhaul or replacement; unauthorized disassembly is prohibited.
2.Cut off total power supply fully before all maintenance work to avoid electric shock hazards.
3.Clean all fixtures, flanges and signal wires after each test, then place accessories neatly in the built-in tool drawer.
4.Store operation manual, calibration certificate and technical documents in fixed storage position for quick reference.
5.When equipment is idle for a long period, cover with matched waterproof dust cover and store in dry, dust-free warehouse environment.
6.Regularly inspect grounding wire integrity and ensure independent short-distance grounding without shared large-current grounding points.