valve for non-rising stem seal gate valves of the elastic
base seat wedge type single ram, using direct channel structure.
Dark stem design, the valve has the remarkable installation space
small feature; ram as ductile iron skeleton +
high-performance rubber, EPDM, advanced plastic injection molding
technology and mature vulcanization process. The adhesive strength,
tensile strength and resilience of the rubber are guaranteed, and
the rubber after vulcanization has no defects such as bubble, crack
and dew iron. Its binding strength meets the requirements of DVGW,
and it will never fall off even if subjected to frequent extrusion
stress. The bonding strength shall not be lower than 1.725mpa when
measured according to GB/T 11211 standard. Make sure that the gate
plates are interchangeable and the valve can be operated with low
torque for sealing effect. gate on both sides of the guide
rail with wear-resisting non-toxic engineering plastic (nylon), and
gate valve is firm, good appearance, can accurate orientation, and
greatly reduces the valve opening and closing torque; high strength
and high precision rolling stem, self-locking performance is good,
and the stem nut and flexible shaft sleeve with precision, to
ensure that the valve torque is extremely low, each parts material
and the machining precision can ensure valve twice in the overload
torque under the action of (according to EN1074.2) without any
obvious damage, has the characteristics of high life; gate
seal USES three type O sealing ring seal, has the advantages of
infinite (no pollution, small torque). The ultra-high surface
finish of the stem ensures that the service life of the stem o-ring
is five times longer than the normal process (stem machining).
stem nut cooperate closely with the ram, and to ensure
that sufficient degrees of freedom, make instant valve open/close
damper under the action of water pressure free adjustment,
thoroughly overcome the bending stress due to the deflection
deformation under the action, and can greatly reduce operating
torque, increases the service life of the valve;
contact seal for spherical sealing face of the upper gate line,
contact area is lesser, open/close the valve and out of the sealing
surface of short time, reduce the valve operating torque, and
achieve the best sealing effect. In the sealing test, there is no
structural damage to the gate plate. The base of the gate plate is
changed from the domestic single seal to the double bar line seal,
which effectively prevents the gate plate's axial swing under the
action of water pressure, enhances the sealing performance, and can
achieve two-way "zero leakage". jacket type rubber seal gate
valves leading global modular design, can be realized with pressure
change on sealing ring, without removing the valve from the piping
is replaceable parts, do not remove the valve cover is easy to
replace the valve stem, bring a lot of convenience to very case
maintenance; /* March 10, 2023 17:59:20
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