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Shanghai Yuhu Self Control Valve Co., Ltd
PQ647F/H Pneumatic Eccentric Hemisphere Valve
NegotiableUpdate on 04/07
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Overview
PQ647F/H Pneumatic Eccentric Hemisphere Valve Pneumatic Eccentric Hemisphere Valve (Standard Type) Pneumatic Eccentric Hemisphere Valve (with Triple Parts and Handwheel Mechanism) I. Overview of Pneumatic Eccentric Hemisphere Valve Products The pneumatic eccentric hemisphere valve produced by Shanghai Yuhu Company belongs to the angular stroke pneumatic regulating valve, commonly known as the pneumatic cam deflection pitch valve
Product Details
PQ647F/H Pneumatic Eccentric Hemisphere Valve
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|---|---|
| Pneumatic eccentric hemispherical valve (standard type) | Pneumatic eccentric half globe valve (with triple piece and handwheel mechanism) |
1、 Overview of Pneumatic Eccentric Hemisphere Valve Products
The pneumatic eccentric half globe valve produced by Shanghai Yuhu Company belongs to the angular stroke pneumatic regulating valve, commonly known as the "pneumatic cam deflection regulating valve". It is composed of imported German piston type pneumatic actuators and eccentric half globe valves. The pneumatic eccentric half globe valve can be equipped with a valve positioner to input control signals (4-20mADC or 1-5VDC) to control the operation of the gas source. It can also be equipped with travel limit switches, solenoid valves, pressure reducing valves, and 0.4-0.7MPa gas sources to achieve switch operation, and send two pairs of passive contact signals to indicate the switch of the valve. Pneumatic eccentric hemispherical valve is a type of angle stroke regulating valve that controls fluid flow by rotating a partial ball valve plate around an eccentric axis. The rotation center of the valve core is not concentric with the rotation axis, which can reduce wear and prolong service life. There is a guide wing at the rear of the valve core, which is conducive to stable fluid flow. The pneumatic eccentric hemispherical valve has good stability. Secondly, there are also characteristics such as high traffic and wide adjustable range. Pneumatic eccentric hemispherical valves are widely used in industries such as petroleum, chemical, power, metallurgy, steel, papermaking, pharmaceuticals, food, textiles, and light industry.
2、 Product features of pneumatic eccentric hemispherical valve
(1) The fluid resistance is small, and the full bore electric ball valve has almost no flow resistance.
(2) Simple structure, small size, and light weight.
(3) Tight and reliable. There are two sealing surfaces, and currently various plastics are widely used as sealing surface materials for ball valves, which have good sealing performance and can achieve complete sealing. It has also been widely used in vacuum systems.
(4) Easy to operate, quick opening and closing, only need to rotate 90 ° from fully open to fully closed, making it convenient for remote control.
(5) Easy to maintain, ball valve structure is simple, and the sealing ring is generally movable, making disassembly and replacement relatively convenient.
(6) When fully open or fully closed, the sealing surfaces of the ball and valve seat are isolated from the medium, and when the medium passes through, it will not cause erosion of the valve sealing surface.
(7) Widely applicable, with diameters ranging from a few millimeters to several meters, suitable for applications from high vacuum to high pressure.
(8) Due to the wiping property of the electric eccentric hemispherical valve during opening and closing, it can be used in media with suspended solid particles.
3、 Main technical parameters of pneumatic eccentric hemispherical valve
| Nominal diameter DN (mm) | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rated current Quantity coefficient KV |
Full cavity type | 14 | 25 | 30 | 55 | 100 | 135 | 230 | 320 | 500 | 850 | 1300 | 1750 |
| 60% cavity type | - | - | - | - | - | - | - | - | 300 | 510 | 780 | 1050 | |
| 40% cavity type | 6 | 10 | 12 | 20 | 40 | 54 | 92 | 128 | 200 | 340 | 520 | 700 | |
| Allowable pressure difference (MPa) | ≤ nominal pressure | ||||||||||||
| Valve body form | Whole cast spherical body | ||||||||||||
| Valve core form | Eccentric rotating valve core (with guide vanes) | ||||||||||||
| flow characteristics | Approximately equal percentage | ||||||||||||
| Action range | Fully open at 60 ° | ||||||||||||
| Leakage quantity Q | Soft seal level VI, hard seal level IV, in compliance with ANSI B16.104 standard | ||||||||||||
| basic error | ±1% | ||||||||||||
| backlash | ±1% | ||||||||||||
| dead zone | ≤1% | ||||||||||||
| adjustable range | Full cavity type (100:1), 60% cavity type (60:1), 40% cavity type (40:1) | ||||||||||||
| Configure execution mechanism | GT, AT, AR, AW series single and double acting pneumatic actuators | ||||||||||||
| Control method | Two position switch control, 4-20mA analog signal control | ||||||||||||
4、 Pneumatic eccentric hemispherical valve actuator parameters
| Model of actuator | GT, AT, AW series single and double acting pneumatic actuators |
|---|---|
| gas supply pressure | 0.4～0.7MPa |
| air source interface | G1/4"、G1/8"、G3/8"、G1/2" |
| ambient temperature | -30～+70℃ |
| mode of action | Single acting actuator: gas closed type (B) - valve position open when gas is lost (FO); Pneumatic opening (K) - valve position closed when gas is lost (FC) Double acting actuator: gas closed type (B) - valve position maintenance during gas loss (FL); Pneumatic opening (K) - valve position maintenance during gas loss (FL) |
| Can be equipped with accessories | Positioner, solenoid valve, air filter pressure reducer, holding valve, travel switch, valve position transmitter, handwheel mechanism, etc |
Adopting a new type of pneumatic actuator, with double acting and single acting (spring reset), gear rack transmission, safe and reliable; The large-diameter valve adopts a series of AW type pneumatic actuators with fork type transmission, with a reasonable structure and high output force, and is available in double acting and single acting types.
1. Gear type dual piston, with large output torque and small volume.
2. The cylinder is made of aluminum material, which is lightweight and aesthetically pleasing.
3. Manual operating mechanisms can be installed at the top and bottom.
4. The rack and pinion connection can adjust the opening angle and rated flow rate.
5. The actuator can be equipped with live signal feedback indicators and accessories to achieve automated operation.
6. The IS05211 standard connection provides convenience for the installation and replacement of products.
7. The adjustable screws at both ends provide a ± 4 ° adjustable range for standard products between 0 ° and 90 °. Ensure synchronization accuracy with internal threaded pneumatic ball valves.
5、 Pneumatic eccentric hemispherical valve component material
| Part Name | material | |||
|---|---|---|---|---|
| Valve body and valve cover | WCB | 304(CF8) | 316(CF8M) | 316L(CF3M) |
| sphere | 2Cr13+nitriding treatment | 304 | 316 | 316L |
| valve stem | 2Cr13 | 304 | 316 | 316L |
| valve seat seal ring | PTFE、 Carbon fiber+PTFE, para polystyrene | |||
| filler | V-shaped PTFE, flexible graphite | |||
6、 Application standard for pneumatic eccentric hemispherical valve
| Design and Manufacturing | GB12237-89、API608、API 6D、JPI 7S-48、BS5351、DIN3357 |
|---|---|
| Flange size | JB/T74～90、GB9112～9131、HGJ44～76、SH3406、ANSI B16.5、JIS B2212～2214、DIN2543 |
| structural length | GB12221-89、ANSI B16.10、JIS B2002、NF E29-305、DIN3202 |
| Inspection and Testing | JB/T 9092、API 598、GB/T13927 |
7、 Product selection of pneumatic eccentric hemispherical valve
(1) Valve body parameters: nominal diameter, working pressure, process medium, usage scenario, valve body material, and other series of parameters.
(2) Actuator parameters: actuator form, control mode, control signal (4-20mA, 1-5V), action mode (air open, air closed)
Please provide the above technical parameters in as much detail as possible to facilitate our company's operations and technical personnel to accurately select for you. If you have any questions You can call us and we will do our best to provide you with high-quality service!
