The air inlet valve of screw air compressor (also known as load reducing valve) is mainly composed of valve body, valve core (piston), air circuit integrated block, solenoid valve and proportional valve (volume regulating valve).The opening degree of the load reducing valve determines the size of the air intake, is the volume of air (pressure) adjustment actuator.When the compressor starts, the load relief valve valve is in the closed position to reduce the starting load of the compressor;During normal operation, according to the measured exhaust pressure and the set value of comparison, proportional valve began to work, so that the load reducing valve valve with the rise and fall of pressure and gradually closed or opened, so that the displacement of air in proportion to smaller (or rise), this process is called proportional adjustment process, control air compressor to complete loading, unloading and other actions.
Technical Date
Main parts material
| Part name | Valve body | Valve shell |
| Materials | HT250 | QT450-10 |
| (Model):D721W-16Z DN200 | |
| (Suitable Medium):(Oil,Air) | |
| (Applicable Temperature):-20/+200ºC | |
| Connection Dimension | 276x114.6x4-φ30.2 |
| Total height | 564x338x135 |
| (m³/min)Delivery Max | 45 |
Main diameter
| Nominal diameter | connected dimension | d0 throat diameter | total height | (delivery max)m3/min |
| DN200 | 276X114.6X4-Φ30.2 | Φ203.5 | 564X336X134.5 | 45 |
Specification
| Type | D971W-16Z |
| Nominal pressure | 1.6MPa |
| Nominal diameter | DN200 |
| Suitable temperature | -20/+120ºC |
| Suitable medium | oil,air |
>>Design manufacture According to GB/T 12243-2005.
>>Connecting dimension and ste pressure may be according to user's request
Samples Show
Shanghai international compressor and equipment exhibition
About Us
Shanghai AFS Valve Manufacturing Co., Ltd. was founded in the early 1970s, specializing in the production of various types of valves, involved in a variety of fields.The company from the early ninety s, form a complete set of air compressor valve involved after decades of development, the main production of various kinds of compressor valve, pressure valve, temperature control valve, the suction valve and so on, at the same time also involves medical breathing machine, cold media series, power plant, oxygen plant, rail transportation, aerospace equipment, valve in the field of chemical industry and so on, successively with more than 60 famous air compressor manufacturer cooperation, such as ingersollRand, Atlas, Fusheng, CompAir, Sullair, Hitachi....
We uphold the "Credit First, Customer Uppermost" purpose, committed to the production of high quality, in line with customer demand products.At the same time to provide a variety of users with a full range of fluid and gas system solutions.
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Frequently asked questions
Q: what kind of express do you send?
A: The normal situation is DHL, if you have other needs, you can contact our salesman.
Q: how long is your delivery time?
A: Normally, the relief valve takes 7 days and the other valves take 45 days.
Q: is it possible to customize the valve?
A: Yes, please contact our salesman for specific size and specification.
Shanghai AFS Valve Manufacturing Co., Ltd.
Web site: http://afsvalve.en.made-in-china.com