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Classification of globe valves

- Nov 11, 2017 -

According to the channel direction

1) Straight-through type globe valve.

2) DC-type cut-off valve: in the DC or Y-shaped cut-off valve, the flow of the valve body and mainstream line into a slash, so that the destruction of the flow state than the conventional valve is smaller, thus through the valve pressure loss is correspondingly small.

3) Angle Stop valve: In the angle stop valve, the fluid only needs to change One direction, so that the pressure drop through the valve is smaller than the normal structure of the globe valve.

4) Plunger type globe valve: This form of cut-off valve is the normal valve variant. In the valve, the disc and seat are usually designed based on the plunger principle. The disc polishing plunger is connected with the stem, and the seal is achieved by two elastic seals sheathed in a plunger. Two elastic seals are separated by a set of rings, and the seals around the plunger are pressed by the load exerted on the bonnet by the bonnet nut. Elastic seals can be replaced by a variety of materials, the valve is mainly used for "open" or "off", but with a special form of plunger or specific ring, can also be used to regulate the flow.

According to the use

Cut-off valve:

The fluorine-lined cut-off valve is suitable for the various concentrations of aqua regia, sulfuric acid, hydrochloric acid, hydrofluoric acid and all kinds of organic acids, strong acid, powerful oxidant, also applicable to various concentrations of strong alkali organic solvents and other corrosive gases, liquid media on the road to use.

GB Globe valve is the most commonly used product of Globe valve series, API US standard cut-off valve ANSI and API standards, valve and seat of the close cover with different hardness of stellite (Stellite) cobalt-based cemented carbide surfacing, sealing reliable, high hardness, wear-resistant, high temperature, corrosion resistance, Good abrasion resistance and long life.

Needle-type valve is a small-caliber instrument valve, in the Instrument measurement pipeline system and the precise flow control role, the main power plant instrumentation series, oil field special series, the United States Standard series.

Cryogenic cut-off valves usually refer to valves operating at temperatures below 110 ℃, widely used in liquefied natural gas, liquefied petroleum gas and other cryogenic industries. From 08 can be manufactured to apply temperature up to -196℃ cut-off valve, all parts using liquid nitrogen for low-temperature pretreatment, completely avoid the use of seal deformation leakage.

Plunger Valve also known as plunger cut-off valve, the sealed cover is provided with a radial seal structure, and the sealed closing valve is compacted by the elastic sealing ring around the plunger by applying the two elastic seals in the grinding bar to the valve cover with the connecting bolts of the valve body and the bonnet.

Insulation jacket cut-off valve using insulation jacket design, the use of external heat sources in the external circulation of the valve heating, can effectively prevent the media through the valve temperature loss, to ensure the temperature of the medium.

Forged steel cut-off valve in accordance with API 602 standard design and manufacture, providing three kinds of bonnet design form: bolt-type bonnet, welded bonnet, pressure from close valve cover, users can choose different forms according to need, provide RF flange, NPT thread, SW welding Three kinds of connection way.

The special cut-off valve of oxygen is made of silicon brass or stainless steel with excellent material quality, and has the advantages of high mechanical strength, abrasion resistance and good safety. The use of oxygen pipe on the road, with the best explosion-proof flame retardant performance, eliminating the oxygen pipeline unsafe factors, widely used in steel, metallurgy, petrochemical, chemical and other oxygen engineering pipe network. In addition to the functions of ordinary valves, but also has its own characteristics. Strict oil-cut measures are used in manufacturing, and all parts are treated in strict degreasing before installation.

Bellows cut-off valve using formed stainless steel corrugated pipe design, corrugated pipe reciprocating test 10,000 no fault, reliable sealing performance, applicable to inflammable and explosive, toxic and harmful medium of industrial and mining, can effectively prevent valve leakage phenomenon.