Product
introduction: Globe valve is closed.(disc) along the valve seat centerline
mobile.According to this mobile form of disc, seat and disc change
in his itinerary directly proportional
relationship. Due to open or close
the valve stem travel relatively short, and very reliable cutting
function, and due to the change of his seat and disc stroke
proportional relationship, is very suitable for the traffic
regulation.Therefore, this type of valve is well suited for use as
cut off or adjust and throttling. Selection
principle: 1, high temperature
and high pressure medium or device appropriate chooses cut-off
valve.Such as power plants, nuclear power stations, petrochemical
system of high temperature and high pressure
piping. 2, convection
resistance is relaxed on the pipeline on the pipeline.Thinking
about small place of pressure
loss. 3, small valve can
choose needle valve, instrument valve, the sampling valve, pressure
gauge valve, etc. 4, there is flow
control or pressure adjustment, but the adjustment accuracy is not
high, and pipe diameter and the relatively small, such as nominal
drift diameter of *0 mm or less piping, appropriate
chooses.
5, synthetic
fertilizer and chemical fertilizer in the industrial production
appropriate chooses *6 mpa or PN**0 PN**0 nominal pressure, nominal
pressure, nominal pressure of *2 mpa pressure Angle globe valve or
high pressure Angle throttle
valves. 6, desilication in
bayer process of alumina production workshop, easy to coking on the
pipeline, easy to choose seat can be separated type, body place,
carbide seal once-through cut-off valve or once-through throttle
valve. 7 on the water
supply, heating, urban construction engineering, nominal
menstruation smaller pipe, can be used as, balancing valve or
plunger valve, the pipeline such as nominal drift diameter less
than **0 mm. The main
advantages: The most obvious
advantage is: in the process of opening and closing, due to the
friction between the disc in the valve sealing surface is smaller
than gate valves, and wear resistance.Open altitude generally only
a quarter of the seat channel diameter, so much smaller than gate
valves.Typically on the valve body and disc only a sealing surface,
thus making craft is good, easy to maintenance.Applicable
temperature: **6 ~ **0 degree centigrade drive mode: manual,
bevel gear drive, pneumatic, electric, hydraulic, pneumatic,
hydraulic linkage, electro-hydraulic linkage: body material WCB,
ZG1Cr*8Ni9Ti, ZG1Cr*8Ni*2Mo2Ti, CF8 (**4), CF3 (**4 l), CF8M (**6),
CF3M, Ti (**6 l).Choose different material, can be respectively
suitable for water, steam, oil, nitric acid, acetic acid, oxidizing
medium, urea, and other media. Features: The pressure,
temperature scope for fluid resistance small, big, medium flow
direction is not restricted, sealed performance is
good. Construction matters
needing attention： 1 a visual
inspection must be conducted before installation of valve, the
valve nameplate should be consistent with existing national
standards universal
signal valve GB
****0.For the working pressure is greater than 1.0 MPa and valve
with the function of cutting off on ZhuGanGuan, strength and strict
performance test should be done before the installation, qualified
rear must use.Strength test, the test pressure is 1.5 times the
nominal pressure, duration of not less than 5 min, shell and
packing shall be no leakage of valve shall be qualified.Leak test,
the test pressure is 1.1 times the nominal pressure;The duration of
the test pressure in the test should comply with the standard of GB
****3 requirements, with no leakage for qualified for valve sealing
surface. 2 the
installation location, altitude, direction of import and export
must comply with the design requirements, the connection should be
firmly connected. 3 all kinds of
manual valves installed on the thermal insulation pipe, handle
shall not down. Cut-off valve disc once
in an open position, it is no longer the contact between the seat
and clapper sealing surfaces, and have a very reliable cutting
action, close to the valve is very suitable for used as medium cut
or adjust and throttling. Once
stop valve is fully open, it will no longer have a contact between
the seat and clapper sealing surfaces, and thus its sealing surface
mechanical wear and tear is small, because most of the cut-off
valve seat and valve disc is easy to repair or replace the whole
valve sealing components without removed from the pipeline, for the
valve and pipeline welding into one occasion is very
applicable.Flow direction of medium through the valve changed, so
stop valve flow resistance was higher than that of other
valves.
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> Packing：Expanding compound
graphite Fastener：High-grade carbon steel，Cr.Mo
steel
