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Gate Valves

Bonney Forge is a leading gate valves manufacturer which are available in two bonnet designs. The first design is the Bolted Bonnet, with male-female joint, spiral wound gasket, made in F316L/graphite. Ring joint gaskets are also available on request. The second design is the welded bonnet, with a threaded and seal welded joint. On request a full penetration strength welded joint is available. 

Gate valves are primarily designed for on-off services when a straight-line flow of fluid and minimum restriction is desired. The closure member of gate valves either stops or allows flow through the valve and acts somewhat like the opening or closing of a gate and is called, appropriately, the gate valve.
The gate is also shown as a wedge, due to the shape it resembles. When the valve is open, the closure member is fully drawn up into the valve, leaving a complete opening for the flow stream. Therefore, there is little pressure drop or flow restriction through the valve. Forge steel gate valves are used in many industrial applications including the oil and gas industry, pharmaceuticals, manufacturing, automotive, and marine. Gate valves are not suitable for throttling purposes.

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Product standards & features

Applicable standard range

SIZE1/4 NPS - 42 NPS
CLASS150 - 4500

Applicable standards

DesignAPI 602, API 600, ASME B16.34
Inspection & testingAPI 598
MarkingMSS SP-25
Fugitive emissionAPI 624, ISO 15848, TA Luft

Applicable end finishes

Face to faceASME B16.10
Socket weldASME B16.11
Screwed ends (NPT)ASME B1.20.1
Flanged endsASME B16.5
Butt welding endsASME B16.25

Product features

1Standard construction of body-bonnet connections are bolted bonnet or welded bonnet type.
2Full die forged structure for all pressure containing parts.
3Flanged valves are provided with flanges integral with the body forgings.
4Standard gasket design for bolted-bonnet valves is spiral wound type up to class ASME 1500. Ring Joint gaskets are standard for ASME 2500 and above. SPW/RJ are available on request for all pressure classes as option.
5High quality packing ( API 622 ) for reliable tightness and low emission performance in fully compliance with API 624.
6Low wedge-seat friction coefficient for reliable sealing & long service life.
7Best-in-Class CV values.
8Outside Screw and Yoke (OS&Y).
9Low operation torque design.
10Self aligning two piece packing gland.
11Fully guided wedge for wear reduction of seating surfaces.