Z44H / P44H, DN 15 ~ 150, Carbon Steel, Quick Opening The Drain
Quick opening the drain valve
Product Type: Z44H / P44H
Nominal diameter: 15 ~ 150mm
Material: Carbon Steel
Working pressure: 1.6 ~ 4.0Mpa
Scope: ≤425 ℃
Quick Opening Drain Valve, if you need more information, please
kindly contact with us.
I. Product Overview
Rising stem resilient seated gate valve, in addition to the
advantages of having a resilient seal
gate valve seat outside, and can be more intuitive valve opening,
opening and closing fast and
reliable, so often applied fire protection and industrial systems
from the ground is usually
installed in a higher position.
Second, the main component material
Valve body gray cast iron, nodular cast iron, cast steel
Ductile iron gate + EPDM or nitrile rubber
The mouth mat nitrile rubber, EPDM
Sealing ring Buna
Bracket gray cast iron, nodular cast iron, cast steel
Valve stem stainless steel
Stainless steel bolt
Gland nodular cast iron, cast steel
Stem nut copper alloy
Handwheel (the drive cap) malleable cast iron
Third, the main technical parameters
Nominal pressure: 1.0 ~ 2.5MPa Operating temperature: 0 ~ 80 ℃
Flange Standard: GB / T 17241.6 GB9113
Test standard water, oil, gas and other:: Nominal by: 50 ~ 400mm
Medium GB13927 AP1598
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
• 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
• 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
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
minimizing the risk of corrosion and malfunction. The wedge nut is
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
prevents creeping corrosion underneath the rubber.
Guides in the wedge and on the valve body ensure a uniform closure
Safe operation is ensured, as the guides prevent overloading of the
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.
Spindle’s gaskets O-ring - “DRY THREAD” - replaceable under
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
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
Epoxy coating to DIN 30677-2 and GSK guidelines - internally and
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
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
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
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
Ductile cast iron
Ductile cast iron + EPDM
Ductile cast iron
2Cr13 S.S.x 20Cr13
Ductile cast iron
Ductile cast iron
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
of water supply.
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
⊙ Light weight
This body is made of ductile iron, it is 20%-30% lighter than the
olds. Easily to fixing and
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.
⊙ 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
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.