300mm Resilient Seat Gate Valve Wedge Nominal Pressure 200 PSI

300mm Resilient Seat Gate Valve Wedge Nominal Pressure 200 PSI 

 

 

 

GATE VALVE, Nominal pressure 200 PSI, Diameter 300 mm., body in grey cast iron GJL- 250,

 

 face to face distance 356 mm., flanged ends as per DIN EN1092-2, PN 16,

 raised face (lug) flange, ISO 7005-2, 

 

non rising stem in SST AISI 304 with two superior sealing gaskets,

 hexagonal post indicator coupling, Epoxi painted as per DIN 30677-2.

 

Post indicator in ductile cast iron GJS-500-7, 

 

as per FM1110 and DIN/AWWA, FM/UL approved. 

 

The column indicator section above the installation surface must have 900 to 1000 mm.

 The column indicator section between the installation surface and the flange connection with the valve must be adjustable from 1065 to 1660 mm.; 

 

moving part with bituminous paint, possible to be blocked by a seal, place to insert a supervision key.

 

 All other parts with Epoxi Munsel 5R4/14 paint in the internal and external parts.

 

 Visual position signaling: Open/Close; supplied with all fixing accessories between valve and column.

 

 

 

Gate Valves With The Facility To Install A Monitor Switch, Size 50mm Upto 1000mm

 

 

Description   BS 5163 Type A, BS EN 1074

Open / Shut position Indicator

Face to face dimension in accordance with BS5163 

Flange drilling in accordance with BS EN 1092 PN16 raised face

Optional anti tamper switch

Optional 1/2” BSP Plugged tapping

 

 

 

Material Specification
Item Material
Body             Cast Iron, EN1531 EN-GJL-250
Stem             Stainless Steel BS970 416 S21
Wedge          Cast Iron, EPDM coated
Bonnet          Cast Iron DN1691 GG25
Handwheel    Ductile Iron GG40

 

 

Pressure
Max Working Pressure: 16 Bar
Shell Test Pressure: 24 Bar

 

A. Stem sealing

Three independent stem seals offering triple safety:

•  A NBR wiper ring protects against dirt from outside.

•  A polyamid bearing with 4 NBR O-rings protects against galvanic corrosion.

• An EPDM rubber manchette sealing acts as the main hydraulic seal to the flow.

B. Body/bonnet connection

The unique assembly of the valve body and bonnet ensures a durable tightness:

•  A round rubber bonnet gasket fits into a recess in the valve bonnet preventing it

   from being blown out by pressure surges.

•  The stainless steel bonnet bolts are countersunk in the valve bonnet, encircled

    by the bonnet gasket and sealed with hot melt. Thus there is no risk of corrosion

    as the bolts are not exposed to the medium or soil.

 

C. Wedge nut

The fixed, integral wedge nut reduces the number of movable valve parts thus

minimizing the risk of corrosion and malfunction. The wedge nut is made of
dezincification resistant brass with lubricating abilities providing optimum compatibility

with the stainless steel stem.

D. Vulcanized wedge

The ductile iron core is fully vulcanized with drinking water approved EPDM rubber

internally and externally.

 

No iron parts are exposed to the medium and the excellent rubber vulcanization

prevents creeping corrosion underneath the rubber.

 

Guides in the wedge and on the valve body ensure a uniform closure regardless of

high pressure.

 

Safe operation is ensured, as the guides prevent overloading of the stem.

 

The wedge has a large through bore and as there are no hollows in the core, stagnant

water or impurities cannot collect and cause contamination.

 

Design features:
 

Spindle’s gaskets O-ring - “DRY THREAD” - replaceable under pressure.

Stainless steel spindle with rolled thread and bearing.

Total sufrace rubbered wedge with replaceable spindle nut.

Gate valve with full bore.

All parts are protected against corrosion.

 

 

Resilient seated gate valve to EN 1074-1 and 2 / EN 1171, with WRAS approved EPDM
rubber parts.

Body and bonnet of GJS-500-7 (GGG-50). Wedge of ductile iron with fixed wedge nut,

fully vulcanized with EPDM rubber. Stem of stainless steel min. 13% Cr with rolled thread
and wedge stop ring.

 

Stem sealing with 4 O-rings in a nylon bearing, an EPDM rubber manchette, and a NBR

wiper ring. EPDM bonnet gasket in a groove, countersunk bonnet bolts encircled by the

bonnet gasket and sealed with hot melt. Sockets fitted with "Euro" sealing rings of EPDM

rubber.

Epoxy coating to DIN 30677-2 and GSK guidelines - internally and externally.
 

 

 

 

The valve gate or closure member is typically in the form of a wedge made of cast iron material

so as to be sufficiently rugged so as to be suitable for high pressure and high flow applications. 

 

In a resilient seat gate valve, the outer surface of the valve wedge is coated with an elastomeric

material so as to offer a bubble-tight seal even at elevated operating pressures. 

 

The valve wedge is operated by turning a threaded stem so as to advance or retract the valve

wedge within the waterway of the valve housing. 

 

Upon valve closure, the resilient material on the edge forms a bubble-tight seal with the internal

surface of the valve body. Dirt or other contamination in the valve operating system can lead to

incomplete sealing of the wedge or other malfunction.

 

Another object of the present invention is to provide a resilient seat gate valve having an

improved wedge operator system which readily overcomes the deleterious effects of contamination introduced either during construction or entrained within product carried to the valve.

 

These and other objects of the present invention which will become apparent from studying the

appended description and drawings are provided in a valve arrangement, that comprises a valve

housing that defines a water passageway and a valve seat within the valve passageway. 

 

A valve wedge disposed within the housing passageway moves along a direction of operation

between a closed position in contact with the valve seat to block flow of water through the valve

passageway and an open position allowing flow of water through the valve passageway. 

 

A pair of spaced apart tracks are disposed within the valve housing on either side of the wedge

and extend along the direction of operation. A pair of opposed wings carried on the valve wedge,

travel in each track. A valve stem coupled to the valve wedge moves the valve wedge in opposite reciprocating directions between valve open and valve closed positions. 

 

Rollers are carried on the wings for rolling engagement with the tracks and scraper blades are

carried on the wings adjacent the rollers to scrape contamination from the tracks. 

 

The tracks may be provided with or without a liner. If a wing is provided without rollers because of

a light loading application, for example, the track is preferably provided without a liner. 

 

A light loading condition may arise, for example, at the upper end of a horizontally oriented

valve arrangement. However, under heavy loading conditions as, for example, at the bottom

end of a horizontally operated valve arrangement, it is preferred that the wings be provided

with load bearing rollers. 

 

In this instance, it is also preferred that the track be provided with a liner of generally U-shaped

cross-section and made of a rugged material such as stainless steel.

 
Specifications:

 

NO	Part name	Material
1	Body	Ductile cast iron
2	Wedge	Ductile cast iron + EPDM
3	Stem nut	ZCuAl10Fe3 Gunmetal
4	Gasket	EPDM
5	Bonnet	Ductile cast iron
6	Gland gasket	ZCuAl10Fe3 Gunmetal
7	Stem	2Cr13  S.S.x 20Cr13
8	Gland	Ductile cast iron
9	Rubber wiper	EPDM/NBR
10	Hand wheel	Ductile cast iron

 
 

FEATURES 

 

⊙ Shot-blasting 

protective surface finished by shot-blasting and the surface is smooth and neatness. 

 

⊙ Flatting seat 

Smooth continuous bore way without seating recess, it is not easy to get impurity pilled up. 

Making the liquid straightway. 

 

⊙ Treating with rubber 

Both inner and outer are coated with advanced knowledge of rubber vulcanization then making 

sure of the elasticity of rubber ,and make sure the exact geometry dimension. Rubber and ductile

 cast iron valve hand together hardly. This can avoid fall-off due to long-term use. 

 

⊙ Anti- corrosion 

Both inner and outer are coated with non-toxic powder epoxy resin to strengthen the capacity of

 Corrosion resisting and raise the quality 

of water supply. 

 

⊙ Ruggedization 

The older ductile iron valve is easy to rupture after being impacted by nonego. It can stop 

rupture depend on the good mechanics capability of ductile iron . 

 

⊙ Three “○” sealed ring 

With the three “O” – rings, the leakage can be greatly reduced and the “O” – ring can be 

replaced under this condition with pressure and without stopping water. The thrust axletree 

reduces the frictional resistance and lowers the operational torque. And it can be switch seal 

ring without opening and closing. 

 

⊙ Rigid round body 

The body is founded minutely, the rigid geometry size ensure inner sealing of valve without 

any process. 

 

⊙ Light weight 

This body is made of ductile iron, it is 20%-30% lighter than the olds. Easily to fixing and 

servicing. 

 

Applications : This valve widely applied in the liquid pipes for opening or closing fixing in such

 water, sewage disposal, electric power, energetics pipe , chemical, shipping, energy sources etc.

 
 
APPLICABLE STANDARDS 
 
⊙ American Standard 
Design to ANSI/AWWA C509 
Face to face dimension to ASME B16.10-2000(ISO 3 series) 
Flange and drilling To SME/ANSI B16.42-1998 

⊙ British Standard 
Design to BS5163,BS5150 
Face to face dimension to BS5163(ISO 3series,ISO19 series) 
Flange and drilling To BS4504 part1(EN1092) 

⊙ Germany Standard 
Design to DIN3352 
Face to face dimension to DIN3202(F4:ISO 14 series;F5: ISO 15 series) 
Flange and drilling to BS EN1092 
 
Applications: This valve widely applied in the liquid pipes for opening or closing fixing in such water, 

sewage disposal, electric power, energetics pipe , chemical, shipping, energy sources etc.