Cast Steel Gate Valve

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Product Description

Cast steel gate valve is characterized by a “gate” that closes in a plane perpendicular to the flow of fluid. They are used primarily for on/off, nonthrottling service.

Product Detail

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1.Introduction of Cast Steel Gate Valve

General considerations

Cast steel gate valve is characterized by a “gate” that closes in a plane perpendicular to the flow of fluid. They are used primarily for on/off, nonthrottling service. Shearing of high-velocity flow will cause a partially open disk to vibrate and chatter, which will damage the seating surfaces and prevent a tight seal. Cast steel gate valve is suitable for most fluids including steam, water, oil, air, and gas. cast steel gate valve may have either a solid or flexible wedge disk. In addition to on/off service, cast steel gate valve can be used for regulating flow, usually in sizes 6 in. and larger, but will chatter unless the disk is fully guided throughout travel.

Type of Valve	Cast steel gate valve
DN	DN50～DN1600
PN（MPa）	1.0～2.5Mpa, 4.0～16Mpa,
Design Temperature Range	-15℃～425℃
Connection type:	Flanged
Actuator type	Manual drive, Pneumatic, Hydraulic or electric Actuator
Applicable Medium	Water, oil, gas, and various corrosion medium

Spare Parts	Material
Body 、Bonnet、Disc	Cast iron, Ductile Iron, Cast steel, Stainless Steel,
Stem	Stainless steel
Sealing surface	Bronze, stainless steel, hard alloy NBR, epdm
Sealing Shim	Enhanced flexible graphite, 1Cr13/flexible graphite
Packing	O-ring, flexible graphite

Cast steel gate valve respond slowly, requiring numerous turns of the handwheel, to go from fully open to fully closed. The disks are made in either a solid or flexible wedge disk. Flexible disks were developed to overcome sticking on cooling in high-temperature service and minimize operating torque. High-pressure service of large sizes is usually cheaper than plug or ball.

Cast steel gate valve is more commonly used in refineries and petrochemical plants where pressure remains relatively low, but temperature may be very high. Gate valves are used less in upstream oil and gas production facilities due to high operating pressures, long opening/closing times, and severe environmental conditions when operating in marine atmospheres.
The cast steel gate valve is a block valve. Due to its design, it cannot control flow; even at the beginning of opening, erosion of the seat and disk occurs, resulting in the destruction of the tight faces.

3.Application Of Cast steel gate valve

4.FAQ

5.About Tianjin Milestone Pump & Valve Co.,Ltd.

6. Contact Information

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