Name: Safety Valve Calibration Bench

Price: Negotiable upon Inquiry

Category: Pressure Test Machine

Keywords: safety valve, calibration bench

I. Basic Parameters of Safety Valve Calibration Bench

II. Clamping Caliber Correspondence Table for Safety Valve Calibration Bench

Flanged safety valves with nominal diameter DN15–DN400
Low-pressure large-caliber safety valves with nominal pressure PN ≤ 32 MPa
Various full-lift and low-lift safety valves
A27W-10T safety valves with ½"~2½" imperial thread
Flanged safety valves with flanges of various thicknesses and shapes
Safety valves with metric and imperial threads
Domestic and imported safety valves
Safety valves applicable to gas and liquid media

III. Technical Parameters of Safety Valve Calibration Bench
Pressure calibration accuracy: 0.4%
Operating temperature range: -20℃ ~ 60℃
Power supply voltage requirement: 220V mains electricity
Clamping force: 300KN; the pre-clamping force is automatically adjusted by the system as the test pressure rises.
Maximum calibration pressure: 32MPa
Medium-caliber station: DN15～DN200, equipped with hydraulic lift control buttons, hydraulic pressure gauges and station valves. It can test both high-pressure and low-pressure safety valves. The gas circuit is fitted with check valves to prevent high pressure from entering the low-pressure system.
Large-caliber station: DN250～DN400, equipped with hydraulic lift control buttons, hydraulic pressure gauges and station valves, suitable for testing low-pressure large-caliber safety valves.
The control console is equipped with eight analog pressure gauges on a stainless steel operation panel for dual pressure display. The pressure gauges have four measuring ranges: 1.6MPa, 4MPa, 16MPa and 60MPa with accuracy Class 0.4. High and low pressure air source pressure gauges are separately mounted on the operation panel.
The clamping bench adopts a hydraulic system (bidirectional double-station hydraulic pump station and hydraulic cylinder with max working pressure of 30MPa) for fixing and clamping, with clamping force ranging from 7T to 30T.
IV. Equipment Requirements
Hydraulic clamping double-station structure, electrically driven bidirectional double-station hydraulic pump station.
Pull-down clamping design; no secondary movement of the mechanism shall occur after the safety valve is positioned and clamped.
The clamping device can move up and down according to flange thickness with stepless electric adjustment, adapting to flanges of all thicknesses as well as both large and small valve seats for convenient and precise operation.
No jamming shall occur during clamping adjustment operation.
Pull-down clamping mode; clamping force shall not act on the workbench, which only bears the weight.
Central positioning blocks must be equipped to realize fast and accurate installation and positioning of safety valves for improved working efficiency.
The holding and clamping mechanism shall not shake when clamping during safety valve calibration.
V. Model Selection

On-line Calibration Bench for Safety Valves

The opening and closing motions of spring-loaded safety valves rely on changes in the medium pressure at their inlet and the pre-tightening force of the spring to automatically open and close the valve disc. When the medium pressure (internal pressure) rises to a level where the lifting force exceeds the spring pre-tightening force, the valve disc overcomes the spring preload and opens automatically to discharge excess medium, causing the internal pressure to drop. Driven by the spring force, the valve disc will automatically close and stop discharge once the internal pressure falls to a safe value.
Based on this principle, it can be deduced that during on-line (also referred to as hot-state) measurement or adjustment of safety valves, if an additional upward force is applied externally, the valve disc will open when the sum of the medium pressure and this external additional force just counteracts the spring pre-tightening force. Even under off-line (cold-state) conditions without medium pressure, the valve disc can be opened solely by the external additional force overcoming the spring preload. The on-line calibration of safety valves is carried out by utilizing this force balance principle.

Safety Valve Lapping Machine

Comprehensive Test Bench for Pressure Switches and Micro-Control Safety Valves

The Comprehensive Test Bench for Pressure Switches and Precisely Controlled Safety Valves belongs to the Commissioning Workshop of the High-speed EMU Manufacturing Center. It is used for the inspection of the actuation value and air tightness performance of pressure switches, as well as the popping pressure, reseating pressure and air tightness performance of safety valves in the maintenance projects of CRH380B series EMUs.

Cylinder Valve Air Tightness Test Equipment

Cylinder Valve Air Tightness Test Equipment
This equipment is mainly used for air tightness testing of finished cylinder valves. Compressed air at a specified pressure is fed into the air inlet of the cylinder valve, which is then submerged in water to check for leaks.
Compressed air with the required test pressure is introduced into the cylinder valve interior; the valve is automatically opened and immersed in water. Leakage inspection is performed during pressure holding. After the valve is lifted out of water, the equipment automatically closes the valve and releases the fixture.
The equipment adopts servo motor control to realize automatic opening and closing of cylinder valves, and uses air cylinder drive to submerge and lift the valves out of the water.

High Pressure Safety Valve Setting Calibration Bench
This bench is mainly applied for the set pressure adjustment, set pressure inspection and tightness performance test of safety valves. It is developed in accordance with the test standards including TSG ZF001-2006 Supervision Regulation on Safety Technology for Safety Valves, GB/T 12242-2005 Performance Test Code for Pressure Relief Devices, GB/T 12241-2005 General Requirements for Safety Valves, and GB/T 12243-2005 Spring Loaded Safety Valves.

Subsea Valve Calibration Bench
Developed by Jinan SUPER Technology Co., Ltd., this bench is mainly used for structural and material inspection of subsea valves, as well as gas tightness test and opening test of two air inlets.
The equipment is equipped with an automatic clamping device to hold test specimens. Clamping can be realized by either pneumatic control or manual operation.
Reference Standard: API 6DSS Subsea Pipeline Valves

Subsea Valve Calibration Bench

As safety equipment for storage tanks, breathing valves mitigate the impact of air pressure by regulating the internal pressure of tanks, maintaining the entire oil tank in a safe state of pressure balance and eliminating potential safety hazards.
The breathing valve leakage testing equipment developed by Jinan Simit Technology Co., Ltd. is mainly used for the air tightness inspection of breathing valves.

Breathing Valve Leakage Test Equipment

Sealing performance test and clamping pressure test for various shut-off valves (gate valves, globe valves, ball valves, check valves, etc.), control valves, safety valves and other high, medium and low pressure valves.

For more details, please click: Valve Test Bench

Breathing Valve Calibration Bench
This bench is mainly used to test the vacuum suction opening pressure and sealing performance of breathing valves for petroleum storage tanks.
It primarily detects the positive opening pressure and negative closing pressure of breathing valves. Equipped with a vacuum pump and negative pressure pump inside to extract pressure, the system can be optionally fitted with an automatic computer control system to realize automatic operation of the equipment.

femenshiyanji-f

nstrument Valve Strength Testing Machine
This machine is mainly applied for the hydrostatic strength test of instrument valves including flowmeter housings, shut-off valves, check valves, safety valves, regulating valves, diverting valves and so on.
If leakage occurs during the pressure holding stage of testing, the equipment can perform automatic pressure compensation. It features stable test pressure and high pressure measurement accuracy.

Intelligent Water-Medium High-Pressure Safety Valve Calibration Bench
This bench is mainly used for performance tests including sealing performance, popping pressure and reseating pressure of high, medium and low pressure safety valves with nominal pressure PN ≤ 160 MPa.
The equipment is equipped with industrial control software and features digital pressure display. It can automatically identify and record set pressure, store test data into the database, and automatically generate safety valve calibration reports in Excel format as required by the custome

Valve Pressure Test System
Developed by Jinan SUPER Technology Co., Ltd., the valve pressure test system serves as testing equipment for valve hydrostatic tests.
It is specially designed and manufactured to meet the pressure testing demands of underground operation production. Both the hardware and software of the equipment can fully satisfy the pressure testing requirements of valves and various other test pieces.

Aircraft Hydraulic Safety Valve Test Bench
This bench is a high-pressure test system mainly used for pressure-bearing parts for aircraft, including aircraft safety valves, hydraulic control check valves, directional control valves, shut-off valves and so on. It can test the popping pressure, reseating pressure and sealing performance of safety valves.
The outlet pressure of this test bench is steplessly adjustable, enabling calibration of high, medium and low pressure safety valves on a single bench.

Safety Valve Set Pressure Calibration Bench
Equipped with a gas booster system, this bench can directly boost medium-pressure gas to high pressure for calibrating safety valves with high-pressure gas media.
It adopts a double-seat pneumatic clamping structure for convenient and fast operation. The clamping feet of small-bore seats feature a patented synchronously linked eccentric disc structure, eliminating the need for centering gaskets during calibration and accommodating various nominal bores with high efficiency and ease of use.
The large-bore seats are designed with stepless adjustable clamping force corresponding to different bores and pressures, suitable for calibrating medium and high-pressure safety valves.

Emergency Relief Device Sealing Testing Machine
This testing machine is mainly used to inspect the sealing performance of emergency relief devices on manhole covers.
It is fitted with a PVC operation panel and analog pressure gauge for real-time and accurate pressure readings, allowing operators to check pressure values quickly. The entire test process is controlled by a computer, which displays measurement data on the monitor and supports printing of test reports.
The system is equipped with an automatic clamping fixture to realize automatic clamping and sealing of manhole covers, as well as a data acquisition unit for automatic sealing test of workpieces.

Valve Endurance Testing Machine
This machine is used to test the service life of valves and conduct fatigue switching strength tests, which plays a vital role in evaluating the switching cycle life of valves.
It covers valve nominal sizes ranging from DN3 to DN500 and test pressures from 0.2 MPa to 50 MPa. Parameters including valve switching torque, switching stroke and rotating speed can be preset to carry out endurance life tests.