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Pneumatic O-cut valve
Product model: Q641F / H / Y
Nominal diameter: DN15 ~ 300mm
Nominal pressure: PN1.6 ~ 6.4Mpa
Applicable temperature: -28 ℃ ~ 300 ℃
Body material: WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti
Applicable medium: steam, water, nitric acid, acetic acid
Design and manufacturing: GB12237-89, API608, API 6D, JPI 7S-48, BS5351, DIN3357
Flange size: JB / T74 ~ 90 (JB74 ~ 90), GB9112 ~ 9131, HGJ44 ~ 76, SH3406, ANSI B16.5, JIS B2212 ~ 2214, NF E29-211, DIN2543
Structure length: GB12221-89, ANSI B16.10, JIS B2002, NF E29-305, DIN3202.
Inspection main test: JB / T 9092, API 598

Overview of pneumatic O-type cut-off ball valve
Pneumatic O-type cut-off ball valve pneumatic actuator adopts new AT / GT series pneumatic actuator. Its structure has obtained national utility model patent. It has double-acting and single-acting (spring return). It adopts rack-and-pinion structure transmission for safer and more reliable performance. .

I. Introduction of Pneumatic O-cut Ball Valve
Pneumatic O-type cut-off ball valve pneumatic actuator adopts new AT / GT series pneumatic actuator. Its structure has obtained national utility model patent. It has double-acting and single-acting (spring return). It adopts rack-and-pinion structure transmission for safer and more reliable performance. ; Large-caliber valves use AW series pneumatic actuators, shifting fork-type structure transmission, reasonable structure and large output torque.
Pneumatic O-type cut-off ball valve has a one-second cut-off ball valve. It is equipped with explosion-proof device and can be cut off by gas. It is composed of ball valve and single-acting piston type pneumatic actuator. It is widely used in natural gas, oil products, chemical industry, metallurgy, paper and electricity office, mining, printing and dyeing, biopharmaceuticals, daily chemical industry, food and beverage, water treatment and air treatment industries. Fluid cut-off control, used with automatic pneumatic instruments.

Second, the working principle of pneumatic o-cut ball valve
Pneumatic O-type cut-off ball valve is composed of valve body, ball body, valve shaft, seal ring, packing, pressure plate and other parts. The actuator consists of gas, piston, gear type, output shaft, cylinder head, bearing, guide ring, piston bearing pad, adjusting bolt, "O" ring and other main components. The actuator is connected to the valve with a connecting shaft. After the air pressure is input in the cylinder, a certain thrust force is generated on the piston, so that the gear-type output is pushed by the piston, the gear output shaft is rotated, and the valve shaft is rotated, so that the ball valve ball rotates in the valve and changes the valve's The flow area can achieve the purpose of changing the flow rate of the medium through the valve.

Product features
1. The thrust bearing reduces the friction moment of the valve stem, which can make the valve stem operate smoothly and flexibly for a long time.
2. The valve seat has good sealing performance, and the sealing ring is made of elastic materials such as polytetrafluoroethylene.
3. Anti-static function: A spring is set between the ball, valve stem and valve body, which can discharge the static electricity generated during the switching process.
4. Stem seal is reliable. Because the stem only rotates and does not perform lifting movement, the packing seal of the stem is not easy to break.
5. Because the materials such as polytetrafluoroethylene have good self-lubricity, and the friction loss with the ball is small, the service life of the ball valve is long.
6, fast cut-off speed, with a one-second cut-off capability, and good sealing performance, can be equipped with explosion-proof devices, can be cut off with gas pipelines.

Material of parts for pneumatic O-type cut-off ball valve

Serial number Part Name Serial number Part Name Serial number Part Name Serial number Part Name Serial number Part Name
1 Valve body 4 Nut 7 Gasket 10 Positioning pieces 13 Valve stem
2 Sealing ring 5 Stud 8 filler 11 Retaining ring 14 Screw
3 Sphere 6 Stone body 9 Packing gland 12 handle 15 Thrust washer


Performance parameters of pneumatic O-type cut-off ball valve

Test pressure (Mpa) Nominal pressure (Mpa) Pressure class JIS (Mpa)
1.6 2.5 4.0 6.4 10.0 150 300 600 10K 20K
Strength test 2.4 3.8 6.0 9.6 15.0 3.1 7.8 15.3 2.4 3.8
Seal test 1.8 2.8 4.4 7.0 11.0 2.2 5.6 11.2 1.5 2.8
Airtight test 0.5 ~ 0.7


Technical parameters of pneumatic O-cut ball valve

Nominal diameter mm DN15-DN300
Material code C P R
main part Valve body WCB ZG1Cr18Ni9Ti ZG1Cr18Ni
12Mo2Ti
Sphere 2Cr13 1Cr18Ni9Ti 1Cr18Ni12MoTi
Valve stem 2Cr13 1Cr18Ni9Ti 1Cr18Ni12MoTi
Sealing ring Reinforced polytetrafluoroethylene
Filling Teflon flexible graphite
Applicable conditions Applicable medium Steam, water Nitric acid Acetic acid
proper temperature -28 ℃-300 ℃
Actuator Type AW, DA / SR series, GTE series, TH series, etc.
Air pressure 0.4-0.7MPa

Seven, installation size table

Nominal diameter
DN (mm)
Size (mm) Actuator type
1.6MPa 2.5MPa 4.0MPa
L D D1 b Z-фD L D D1 b Z-фD L D D1 b Z-фD Optional DA / SR, QGSY,
SY-CH, GTD / GTE
AW / AWS, SY-YD,
The above series of actuators are only for reference for specific selection.
15 130 95 65 14 4-14 130 95 65 16 4-14 130 130 65 16 4-14
20 130 105 75 14 4-14 130 105 75 16 4-14 150 150 75 16 4-14
25 140 115 85 14 4-14 140 115 85 16 4-14 160 160 85 16 4-14
32 165 135 100 16 4-18 165 135 100 18 4-18 180 180 100 18 4-18
40 165 145 110 16 4-18 165 145 110 18 4-18 200 200 110 18 4-18
50 203 160 125 16 4-18 203 160 125 20 4-18 230 230 125 20 4-18
65 222 180 145 18 4-18 222 180 145 twenty two 8-18 290 290 145 twenty two 8-18
80 241 195 160 20 8-18 241 195 160 twenty two 8-18 310 310 160 twenty two 8-18
100 305 215 180 20 8-18 305 230 190 twenty four 8-23 350 350 190 twenty four 8-23
125 356 245 210 twenty two 8-18 356 270 220 28 8-25 400 270 220 28 8-25
150 394 280 240 twenty four 8-23 394 300 250 30 8-25 480 300 250 30 8-25
200 457 335 295 28 12-23 457 360 310 34 12-25 600 375 320 38 12-30


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