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Actuated EPDM / NBR Resilient Seated Bolted Bonnet Gate Valve / Water Gate Valves

RSDZ45X

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Description

WRAS DN1200 GGG 50 Body / Bonnet ?Resilient Seated Gate Valve with EPDM / NBR Seat
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Resilient seat gate valves are employed in the transport of clean water.?

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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.?

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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.?

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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.?

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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.

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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.

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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.?

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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.?

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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.?

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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.?

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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.?

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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.?

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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.


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Specifications:

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- - - -
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 |
- - - -

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FEATURES?

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⊙ Shot-blasting?

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

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⊙ Flatting?seat?

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

Making?the?liquid?straightway.?

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⊙ 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.?

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⊙ 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?.?

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⊙ 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.?

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⊙ Rigid?round?body?

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

any?process.?

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⊙ Light?weight?

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

servicing.?

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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.


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APPLICABLE?STANDARDS?
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⊙ 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.
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