V-shaped ball pneumatic valve selection of design standard and characteristics

v-shaped ball pneumatic valve is a kind of pneumatic valve, it shut down a is half sphere has a V opening, v-shaped opening has a sharp edge, in the process of rotating sphere, wiping, between the closed to the media has a strong cutting force, the sphere of the v-shaped opening port to form a fan-shaped area with the pneumatic valve seat, can change the port area, in the process of rotary forming of medium precision adjustment, it is a kind of Angle of the adjustment of the rotary pneumatic valve, the same as the ordinary ball pneumatic valve seal performance, make it have a combination of regulation and switch two functions, equipped with pneumatic or electric actuators, widely used in industrial process control system.
v-shaped ball belongs to fixed pneumatic ball valve pneumatic valve, is also a single pneumatic seat sealing ball valves, regulating performance is the best in the pneumatic ball valve, flow characteristic is the percentage of, such as: adjustable ratio. The v-shaped incision and metal shearing action between the pneumatic valve seat, especially suitable for fiber, tiny solid particles and slurry medium. It
pneumatic ball valve with the same rotation movement, different is the cock body is ball, a circular hole or channel through its axis. Pneumatic ball valve in the line is mainly used to do cutting, distribution, and change the flow direction of medium, it only need to use rotation operation and small rotational torque can be closed tightly. Pneumatic ball valve is suitable to do the most switch, cut off the pneumatic valve is used, but recent development has pneumatic ball valve designed to make it with throttling and control flow, such as pneumatic valve v-shaped ball.

v-shaped ball pneumatic valve product features:
, pneumatic valve body integral structure of wafer and flange V type pneumatic valve pneumatic ball valve body is overall side mounted structure, structure, strong rigidity, not easy to cause deformation and leakage.
, self-lubricating bearings, self-lubricating bearings, up and down pneumatic valve body is equipped with pneumatic valve stem and the contact area is large, high bearing capacity, small friction coefficient, reduce torque of pneumatic valve.
, pneumatic valve seat can be according to the needs of medium and conditions, choose metal hard seal or PTFE soft seal: carbide surfacing metal hard seal pneumatic valve seat sealing surface, spherical surface hard chromium plated or spray welding, ion nitriding, such as hardening treatment, the service life of the sealing surface, enhance heat resistance increase; Soft PTFE sealing pneumatic seat or reinforced PTFE seat tightness good corrosion resistance, wide adaptation.
and economic practicality: pneumatic valve body light weight, small pneumatic valve rod torque, pneumatic or electric actuators with corresponding specification is small, compared with other types of regulating pneumatic valve, high cost performance.
medium adaptation range: because the v-shaped opening and the shear force between pneumatic valve seat, and pneumatic valve cavity flow in smooth round, make the medium is not easy to accumulate in the inner chamber, so it except for the liquid medium, more suitable for fiber and solid material medium system control.
and small flow precise control: by means of special v-shaped opening small pneumatic valve core processing, small Cv value precise control can be realized.

V
pneumatic valve design standard, flanges standard: GB/T. - ,JB / T。 - HG - ,ASMEB。 ,- - - - - - :
and pressure temperature rating: GB/T - 、ASME. - 是- - - - - -
standard, structure, length: wafer: enterprise standard flange, ISAS. - ,IEC / DIN - -
, to adapt to the temperature range: - ℃ one? Type C at room temperature in a goC_C temperature type a goC_C high temperature type
, sealed with
strength and seal strength test standard test standard: GB/T? -

v-shaped ball pneumatic valve industry ( Field) Include: energy, petrochemical, metallurgical, chemical, mining, paper making, environmental protection, biochemical, pharmaceutical, oil, electricity, printing and dyeing, light industry, food, tobacco, sugar, beverage and other fields.

V pneumatic valve pneumatic ball seat leakage test method and steps - -
to
a, ready to try the v-shaped ball pressure corresponding pneumatic valve flange and check whether the o-ring is in good condition, if damage should be timely exchange;
b, ready to test with a measuring cup or leakage flow meter, the accuracy should be higher than measured pneumatic valve allows the leakage reading value + %. Measured V
pneumatic ball valve and pressure flange fixed
a, measured v-shaped ball hoist with lifting equipment pneumatic valve pressure test equipment ( Plane) Good, the 'O' ring position, clamping. （ Note: before the end of the test is not permitted to measure V pneumatic valve ball and lifting equipment release)
b the pressure flange, bolts, nuts and measured V pneumatic valve clamping the ball.
to the actuator input signal of the pressure of gas chamber and needed to close the pneumatic valve torque, v-shaped ball pneumatic valve in the closed position. See table actuator input signal pressure values.
to be measured a v-shaped ball test medium pneumatic valve input, and adjust the medium pressure to the specified value:
a, metal seal: test medium for room temperature with air or water;
b, the soft seal: test medium for air;
c, test medium for room temperature water, test pressure. PN；
medium for air test, the pressure is zero. MPa；
note: the test medium for room temperature water, to rust should add rust inhibitor in the water.
the v-shaped ball to be measured input after medium pressure pneumatic valve, make the V pneumatic valve core ball ~ time after closing, when V pneumatic ball valve leakage, stable measurements at the exit to the v-shaped ball pneumatic valve v-shaped ball pneumatic valve leakage.
flow test pressure according to regulations;
will be v-shaped ball measurement pneumatic valve from pressure testing machine, net residual water in the pneumatic valve, residual water and compressed air to blow dry.

V pneumatic valve - ball China pump pneumatic valve network quality suppliers recommendation: