Product model: ZSQN
Nominal diameter: DN20 ~ 200mm
Nominal pressure: PN1.0 ~ 6.4Mpa
Connection method: flange
Valve body material: Cast iron, carbon steel, stainless steel
Applicable media: Cater, steam, oil, acid and alkali, etc
Applicable temperature: Soft seal (tetrafluoroethylene) ≤ 180 ℃, hard seal ≤ 450 ℃
Flange standard: Cast iron flange GB4216-84, cast steel flange GB9113-88, JB / T79-94
Structure length: GB / T12221-89
PRODUCT OVERVIEW
Pneumatic piston type three-way shut-off valve is the executive unit of pneumatic unit combination instrument. It receives the signal from the regulating instrument to control the cutting and connecting of the fluid in the process pipeline or switching the flow channel. The product has the advantages of large operating force, novel valve body design, small flow resistance, large rated flow coefficient, large allowable differential pressure, excellent sealing performance and so on. Therefore, it is widely used in the production process automatic control and remote control system of petroleum, chemical industry, metallurgy, electric power, light textile and other industrial departments.
PRODUCT FEATURES
1. The pneumatic piston three-way shut-off valve is composed of a pneumatic piston actuator and a straight stroke adjusting mechanism, and the middle is connected by a support. According to the type of regulating mechanism, pneumatic piston shut-off valve can be divided into three types: straight through single seat shut-off valve (zsqp type), straight through sleeve shut-off valve (zsqm type) and two position three-way shut-off valve (zsqn type). There are two kinds of pneumatic piston actuators: single acting (spring return) and double acting (double air inlet). Single acting actuator is adopted, and the action mode of the whole machine can be divided into air closed type (horizontal pipeline connected) and air open type (horizontal pipeline disconnected). Pneumatic piston cut-off valve has two sealing forms: hard seal and soft seal, which are applicable to different temperatures and pressures respectively.
2. When the signal pressure is zero, the valve core is in the initial state (normally open or normally closed) due to the preload of the spring (single acting only). When the actuator receives the signal pressure (0.4 ~ 0.6MPa), the piston generates thrust and compresses the spring to drive the push rod, valve body and valve core to the limit position to fully open or close the valve. Achieve the control of medium connection, cut-off or switching between pipelines in the pipeline. Equipped with two position three-way solenoid valve, the control of piston shut-off valve is more convenient and simple.
MAIN PERFORMANCE PARAMETERS
| Nominal diameter mm | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seat diametermm | 26 | 43 | 43 | 52 | 62 | 79 | 94 | 115 | 145 | 166 | 216 | May cooperate with the company Negotiate production | |||
| Rated flow coefficientKv | 6.5 | 10 | 15 | 25 | 40 | 65 | 100 | 150 | 260 | 350 | 540 | ||||
| Nominal pressureMPa | 4.0(JB/T79·2-94) | ||||||||||||||
| Trip mm | 16 | 25 | 40 | 60 | |||||||||||
| Medium temperature ℃ | -16 ~ 150 (normal temperature)- 60 ~ 450 (medium temperature)- 60 ~ 550 (high temperature)- 250 ~ 60 (low temperature); | ||||||||||||||
| Flow characteristics | Two position quick opening | ||||||||||||||
| With actuator | ZSD-D | ZSD-3 | ZSD-5 | ZSD-7 | |||||||||||
| Flange size and type | According to JB / T79.2-94 concave type (normal, medium and high temperature); According to JB / T79.3-94 tenon and groove type (low temperature) | ||||||||||||||
| Body material | ZG270-500；ZG1Cr18Ni9Ti；ZG0Cr18Ni12Mo2Ti | ||||||||||||||
TECHNICAL PARAMETERS OF ACTUATOR
| Model | ZSD-D | ZSD-3 | ZSD-5 | ZSD-7 |
|---|---|---|---|---|
| Piston diameter mm | 150 | 200 | 300 | 400 |
| Effective areacm2 | 175 | 305 | 700 | 1245 |
| Trip mm | 16 | 25 | 40 | 60 |
| Air inlet thread | M16×1.5 | M20×1.5 | M24×2 | |
| Maximum output force n | 7200 | 12800 | 29300 | 5200 |
| Accessories available | Air filter pressure reducer, holding valve, travel switch, valve position transmitter, solenoid valve, handwheel mechanism, etc | |||
| Operating air supply pressure KPa | 500 | |||
MAIN PERFORMANCE INDEXES
| Nominal diameter mm | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Leakagedrop/min | Soft seal | 0 | ||||||||||
| Hard seal | 1 | 3 | 5 | 7 | 9 | |||||||
| Cut off timeS | 1～2 | 2～4 | ||||||||||
Rated stroke deviation% | +10 | |||||||||||
MAIN OVERALL CONNECTION DIMENSIONS
Nominal Drift diameter | L | H2 | With handwheel | Without handwheel | |||||
|---|---|---|---|---|---|---|---|---|---|
| H | H1 | H3 | Weightkg | H | H1 | Weightkg | |||
| 20 | 180 | 53 | 662 | 447 | 222 | 39 | 574 | 359 | 26 |
| 25 | 190 | 111 | 732 | 46 | 644 | 33 | |||
| 32 | 210 | 117 | 744 | 48 | 656 | 35 | |||
| 40 | 230 | 131 | 885 | 570 | 280 | 85 | 778 | 463 | 61 |
| 50 | 255 | 146 | 915 | 89 | 808 | 65 | |||
| 65 | 285 | 181 | 1131 | 706 | 389 | 135 | 969 | 542 | 97 |
| 80 | 310 | 190 | 1147 | 143 | 983 | 99 | |||
| 100 | 355 | 194 | 1155 | 163 | 991 | 109 | |||
| 125 | 425 | 256 | 1588 | 1022 | 305 | 1305 | 739 | 218 | |
| 150 | 460 | 266 | 1608 | 331 | 1325 | 244 | |||
| 200 | 560 | 289 | 1659 | 445 | 1376 | 358 | |||
