Active Member
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[China]
Address: No.159 Jiugan road Sijing industrial zone Songjiang District Shanghai, China
Contact name:Steve
Shanghai kangquan Valve Co. Ltd. |
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DIN 30677-2 Standard Full Bore resilient seated valve Epoxy Coating
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.
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.
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.
