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  • Pressure test method of safety valve

    Pressure test method of safety valve

    ① The strength test of safety valve is the same as that of other valves. When testing the lower part of the valve body, the pressure is introduced from the I = I end, and the sealing surface is closed; When testing the upper part of the valve body and the valve cover, the pressure is introduced f...
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  • Pressure test method of gate valve

    Pressure test method of gate valve

    The strength test of gate valve is the same as that of globe valve. There are two methods for sealing test of gate valve. ① The ram is opened to raise the pressure in the valve to the specified value; Then close the gate valve, take out the gate valve immediately, check whether there is leakage a...
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  • Pressure test method of stop valve and throttle valve

    Pressure test method of stop valve and throttle valve

    For the strength test of stop valve and throttle valve, the assembled valve is usually placed in the pressure test frame, the valve disc is opened, the medium is injected to the specified value, and the body and bonnet are checked for sweating and leakage. The strength test can also be carried ou...
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  • Pressure test method of plug valve

    ① During the strength test of the plug valve, the medium is introduced from one end, the other passages are closed, and the plug is rotated to each fully open working position in turn for the test, and the valve body is qualified if no leakage is found. ② During the sealing test, the straight thr...
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  • Pressure test method of butterfly valve

    Pressure test method of butterfly valve

    The strength test of pneumatic butterfly valve is the same as that of stop valve. The sealing performance test of butterfly valve shall introduce test medium from the human end of medium flow, and the butterfly plate shall be opened and the other end shall be closed, and the injection pressure sh...
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  • Pressure test method of pressure reducing valve

    Pressure test method of pressure reducing valve

    ① The strength test of pressure reducing valve is generally assembled after single piece test, and it can also be tested after assembly. The duration of strength test: 1 min for DN < 50 mm; 2 min for DN 65-150 mm; 3 min for DN > 150 mm. After the bellows are welded with the components, the ...
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  • Pressure test method of check valve

    Pressure test method of check valve

    Check valve test status: lift check valve disc axis is in the position perpendicular to the horizontal; swing check valve channel axis and disc axis are in the position approximately parallel to the horizontal. During the strength test, the test medium is introduced from the inlet end to the spec...
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  • Pressure test method of ball valve

    Pressure test method of ball valve

    The strength test of pneumatic ball valve should be carried out under the condition of ball half open. ① Sealing test of floating ball valve: put the valve in half open state, introduce test medium into one end and close the other end; rotate the ball several times, open the closed end when the v...
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  • Compound exhaust valve

    Compound exhaust valve

    1、 Equipment introduction The compound exhaust valve is a barrel shaped valve body, which mainly contains a group of stainless steel balls, rods and plugs. The valve is installed at the pump water outlet or in the water supply and distribution pipeline to discharge a large amount of air accumula...
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  • Advantages and disadvantages of various valves

    Advantages and disadvantages of various valves

    1. Gate valve: gate valve refers to the valve that the closing member (RAM) moves in the vertical direction of the channel axis. It is mainly used as the cutting medium on the pipeline, that is, full open or closed. Generally, gate valves are not used as regulating flow. It can be used for low te...
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  • Selection and location of valves

    1、 Valve selection and setting position: (1) The valves used in the water supply pipeline are generally selected according to the following principles: 1. When the pipe diameter is not more than 50mm, the stop valve should be used. When the pipe diameter is greater than 50mm, gate valve and bu...
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  • Relationship between nominal pressure, working pressure and other pressures

    1、 What is nominal pressure PN (MPA)? The reference value related to the pressure resistance capacity of piping system components refers to the design given pressure related to the mechanical strength of piping components. The nominal pressure is generally expressed by PN. (1) Nominal pressure &...
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  • The single eccentric butterfly valve market is impressive, including major players Emerson, Flowserve, Cameron, Kitts

    Contrive Datum Insights’ latest report on the single eccentric butterfly valve market provides a brief overview of the industry as well as product definitions and market scope. The sections following the introductory chapter conduct an in-depth study of the single eccentric butterfly valve ...
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  • Emerging trends in the lug butterfly valve market with growth strategies, market dynamics and competitive landscape 2026

    The research done by In4Research provides unique insights into business models, key market dynamics (drivers, constraints, trends and opportunities), competitor analysis, and the respective market shares of the main players in the Lug butterfly valve industry. Market segmentation by company, regi...
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  • resilient seated flanged gate valve

    Giovanni F. Accolla, Franco Cardini, Domenico Del Nero, Giordano Bruno Guerri, Gennaro Malgieri, Gennaro Sangiuliano, Mirella Serri, Marcello Veneziani. Cosìparla la leggenda di Olaf Asterson. Così, Ulaf le le sfere in cue l’essere umano vive le proprie esperienze, “la leggenda del so...
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  • Use species specificity to understand the tropism of human-specific toxins

    Many pathogens produce virulence factors against their natural hosts. Clinically, methicillin-resistant Staphylococcus aureus (MRSA) isolates are highly adapted to humans and produce a series of human-specific virulence factors. One such factor is LukAB, a recently discovered pore-forming toxin t...
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