Gate Valve
Gate Valve - Image 2
Gate Valve - Image 3
Gate Valve - Image 4

Gate Valve

A gate valve, also known as a sluice valve, is a valve that opens by lifting a barrier (gate) out of the path of the fluid. Gate valves require very little space along the pipe axis and hardly restrict the flow of fluid when the gate is fully opened. The gate faces can be parallel, but are most commonly wedge-shaped (to be able to apply pressure on the sealing surface).

Category:

Specifications

 

Standard: DIN 3352-F4, DIN 3352-F5, BS5163, AWWA C509，AWWA C515

Flange drilling is according to DIN2501, BS4504 and ANSI B16.1

Working pressure: 10bar/16bar/25bar

Testing pressure:

Shell: 15bar/24bar/37.5bar

Seal: 11bar/17.6bar/27.5bar

Type: non-rising stem / rising stem

Material:

Body: Ductile iron GGG40/50 or Cast IronGG25

Wedge: Ductile iron GGG40/50+EPDM/NBR or metal seated

Stem: stainless steel 2Cr13 , SS304,SS316

Bolt and Nuts: Carbon Steel with zinc plated or SS304, 316

Coating: Internal and external with fusion bonded epoxy coating min250μm

 

Type of Gate Valves based on Stem Movement:

Non-Rising Stem – In this type of valve, there is no upward movement of the stem. The valve disk is threaded internally. The disc travels along the stem like a nut when the stem is rotated. In this type of valve, stem threads are exposed to the flow medium. Therefore, this design is used where space is limited to allow linear stem movement, and the flow medium does not cause erosion, corrosion, or wear and tear to the stem material.  This type of valve also known as insider screw valve.

 

Rising Stem – the stem will go up while opening the valve and move down when you close the valve. In an inside screw design, the threaded portion of the stem is in contact with the flow medium, and when you open the valve, the handwheel rises with the stem.

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