Test Equipment

Why do valve inspection&tesing?

XinHui valves stand for high quality, reliability and technology. Quality is an integral part of our company strategy and is visible from the care with which we choose the raw materials. XinHui’s mission is aimed at continuous improvement by enhancing our staff, motivating them and stimulating them to learn and update themselves.

valve inspection

Forging inspection(chemical component analysis, tensile impact test,metallographic analysis) incoming quality control(forging and fittings inspection) Process Quality Control(Machining inspection,assembly inspection,stress testing) final inspection(product inspection)

Valve Testing Instruments

Spectrograph
High precision Leeb hardness tester
Impact tester
Rockwell hardness tester
Tensile testing machine

Cryogenic testing chamber
Ultrasonic thickness gauge
Helium mass spectrometer
High temperature test chamber
Microscopic metallographic testing machine

Forging inspection → Incoming inspection → Process inspection → Final test

About Me

Valve factory inspection details

valve inspection

Valve inspection and test items

Xinhui Valve Co., Ltd. is a high-tech chemical valve manufacturer integrating R&D, production, sales and service, specializing in the production of power station valves, high temperature and high pressure valves, forged ball valves, three-way ball valves, pigging valves, slurry valves, petrochemical valves Equipment and other products, valve varieties are complete, the first in the industry to pass ISO9001, CE international certification, etc., and put into use in various fields, users highly recognized our company’s valve products.

1. Inspection and test items of various types of valves
Valve class		gate valve	Globe valve	throttle valve	Ball valve	Butterfly valve	Diaphragm valve	Plug valve	check valve
Check and test items	shell body strength	√	√	√	√	√	√	√	√
	sealing performance	√	√	－	√	√	√	√	√
	Upper sealing performance①	√	√	－	－	－	－	－	－
	quality of castings	√	√	√	√	√	√	√	√
	Continuous trouble-free opening and closing operation	√	√	－	√	√	√	√	－
	Minimum valve body wall thickness	√	√	√	√	√	√	√	√
	Inner cavity cleanliness	√	√	√	√	√	√	√	√
	Maximum opening and closing torque	√	√	－	√	√	√	√	－
	Anti-static test	－	－	－	√	－	－	－	－
	Fire resistance test ②	－	－	－	√	－	－	－	－
	Parts inspection	√	√	√	√	√	√	√	√
	Flow test	√	√	√	√	√	√	√	√

① Valves with upper sealing performance requirements need to be tested for upper sealing

② Other valves can also be tested for fire resistance if they have fire resistance requirements

2. Inspection and test items of safety valve, pressure reducing valve and steam trap
Valve class	safety valve	pressure reducing valve	Steam Traps Valves
Inspection and test items	shell body test	shell body test	shell body test
	sealing test	Pressure regulating performance	action performance
	Set pressure deviation	pressure characteristics	Thermal condensation junction water Displacement
	discharge pressure	Traffic characteristics	Air leakage volume
	Turn on height	Continuous trouble-free opening and closing operation	Exhaust Air Capability
	Mechanics Characteristics	sealing performance	Continuous trouble-free opening and closing operation
	action repetitiveness	flow	quality of castings
	Opening and closing pressure difference	quality of castings	highest working pressure
	Displacement	Inner cavity cleanliness	Minimum working pressure
	quality of castings	－	Maximum working back pressure
	Inner cavity cleanliness	－	Maximum subcooling and minimum subcooling
	－	－	Inner cavity cleanliness
	－	－	－
	－	－	Withstand voltage test①

①The withstand pressure test is a test of the trap parts that are subjected to external pressure (such as the ball of the floating ball trap, etc.)

3. Factory test and type test items of safety valve, pressure reducing valve and steam trap
safety valve			pressure reducing valve			Steam Traps Valves
Test item	out of factory	Type	Test item	out of factory	Type	Test item	out of factory	Type
shell body strength	√	√	shell body strength	√	√	shell body strength	√	√
sealing test	√	√	sealing test	√	√	action performance	√	√
set pressure	√	√	Pressure regulating performance	√	√	Minimum working pressure	－	√
emission pressure	√	√	Traffic Features	－	√	highest working pressure	－	√
Opening pressure deviation	－	√	pressure characteristics	－	√	Maximum working back pressure	－	√
Turn on height	－	√	flow	－	√	Exhaust Air Capability	－	√
mechanical features	－	√	Continuous running test	－	√	Maximum subcooling and minimum subcooling	－	√
Displacement	－	√	－	－	－	Air leakage volume	－	√
－	－	－	－	－	－	Thermal condensation junction water Displacement	－	√

4. Key items and main items for valve quality grade assessment ①②
Valve class	gate valve	Globe valve	throttle valve	Ball valve	Butterfly valve	Diaphragm valve	Plug valve	check valve
shell body test	△	△	△	△	△	△	△	△
sealing performance test	△	△	－	△	△	△	△	△
Upper sealing test ③	△	△	－	－	－	－	－	－
quality of castings	△	△	△	△	△	△	△	△
Continuous trouble-free opening and closing operation	△	△	－	△	△	△	△	－
Minimum valve body wall thickness	○	○	○	○	○	○	○	○
Inner cavity cleanliness	○	○	○	○	○	○	○	○
Maximum opening and closing torque	－	○④	－	－	○	－	－	－
gate-Wear-Margin	○	－	－	－	－	－	－	－
Flange dislocation during non-processing	○	－	－	－	－	－	－	－
valve body lining material	－	－	－	－	－	○⑤	－	－
Diaphragm Performance	－	－	－	－	－	○	－	－

①△ is the key item

②○ is the main item

③ Valves with upper sealing performance requirements should be tested for upper sealing

④High pressure balance globe valve has this requirement

⑤Applicable to lined diaphragm valve

5. Key items and main items for quality grade assessment of safety valves, pressure reducing valves and steam traps①②
safety valve		pressure reducing valve		Steam Traps Valves
shell body test	△	shell body strength	△	shell body test	△
sealing test	△	Pressure regulating performance	△	action performance	△
Opening pressure deviation	△	pressure characteristics	△	Withstand voltage test④	△
discharge pressure	△	Traffic Features	△	Thermal condensation junction water Displacement	△
Turn on height	△	quality of castings	△	Air leakage volume	△
mechanical features	△	Continuous trouble-free opening and closing operation	△	Exhaust Air Capability	△
action repetitiveness	△	sealing performance	○	quality of castings	△
Opening and closing pressure difference	△	Inner cavity cleanliness	○	Continuous trouble-free opening and closing operation	△
Spring ③	△	－	－	highest working pressure	○
quality of castings	△	－	－	Minimum working pressure	○
Inner cavity cleanliness	○	－	－	Maximum working back pressure	○
Displacement	○	－	－	maximum subcooling	○
－	－	－	－	Inner cavity cleanliness	○
－	－	－	－	Pouring-buckle residual amount⑤	○
－	－	－	－	Residual amount after welding repair⑥	○

①△ is the key item

②○ is the main item

③Suitable for spring type safety valve

④For trap parts that are subject to external pressure, such as the ball of a floating ball steam trap, etc.

⑤, ⑥ Applicable to mechanical type steam trap with closed float

High temperature valves mainly refer to high temperature valves used in oil refineries. High temperature working conditions mainly include sub-high temperature, high temperature grade I, high temperature grade II, high temperature grade III, high temperature grade IV, and high temperature grade V. See more or contact us for options for various conditions!

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Since 2008, we have been serving in the industry for 15 years. Whether it’s300 series stainless steel, super duplex steel, nickel based alloy materials,trust us to provide you with a relaible solution!

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Test Equipment

Why do valve inspection&tesing?

valve inspection

Valve Testing Instruments

About Me

Valve factory inspection details​

valve inspection

Valve inspection and test items

Contact Us

Valve factory inspection details