Pneumatic vacuum ball valve - Shanghai Dongfeng Pump Valve Factory - 上海花千坊_上海龙凤花坛_夜上海最新论坛

Pneumatic vacuum ball valve

  • [Valve model]: GUQ High Vacuum Ball Valve
  • [Diameter specification]: DN15～DN100
  • [Structure]: Floating straight through
  • [Valve body material]: Stainless steel 304, 316, 316L
  • [Nominal pressure]: 1.3×10-7Pa～6×105pa
  • [Applicable temperature]: -30℃～+232℃
  • [Application Scope]: Air and non corrosive gas, in vacuum system
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  • Pneumatic vacuum ball valve

Product features

Pneumatic vacuum ball valve means that the working pressure of the valve is lower than the standard atmospheric pressure, that is, it is in the state of vacuum negative pressure, so it is also called pneumatic negative pressure ball valve, which is mainly used for on-off control or flow regulation in the vacuum system. The pneumatic vacuum ball valve has very high requirements on materials and cleanliness, because it is necessary to ensure that there is no volatile matter under vacuum, and it has undergone sealing strengthening treatment, which can effectively prevent atmospheric environmental impurities from entering the valve chamber to pollute the medium. The pneumatic vacuum ball valve can be installed at any position, which can not only be used in the vacuum pipeline system, but also operate normally under a certain pressure.
 
Features of pneumatic vacuum ball valve:
 
1. It can work normally under high vacuum condition, and can also be used in low pressure systems to achieve the advantages of both positive and negative pressure;
2. Pneumatic vacuum ball valve uses air source pressure to control the valve, with small driving torque, which can be opened and closed quickly in a short time;
3. It can be installed at any position, and has a variety of different connection modes, which can meet any complex situation;
4. The pneumatic high vacuum ball valve has simple structure and good sealing performance. Different materials and action forms can be used in different working conditions.
5. It is widely used in vacuum, dairy products, wine industry, bioengineering, food and chemical industry, and can effectively ensure the sealing performance of valves.

technical parameter

Nominal diameter DN15～DN100(mm)
Pressure range 1.3×10-7Pa～6×105pa
Connection mode Looper flange, welding flange, quick installation type, thread
Valve body structure Three piece valve body
Drive mode Pneumatic control 0.4-0.7bar
working temperature -30℃～+232℃
Applicable media High purity gas and non corrosive gas
Form of action Single acting spring return (normally open, normally closed), double acting (air to open and air to close)
control mode Cut off type (switch two position control), regulation mode (4-20mA signal proportional regulation)

How to reduce the air leakage rate of pneumatic vacuum ball valve:
 
1. Evacuate the pipeline connected to the pneumatic high vacuum ball valve, and use arc transition to make the air path unblocked and unblocked.
2. Dead corners shall be avoided as far as possible, and high-precision polishing shall be adopted to fully meet the applicable standards of vacuum.
3. Strengthen the polishing treatment of the internal and external surfaces of the pneumatic high vacuum ball valve to make it difficult to absorb gas and achieve vacuum effect.
4. Minimize the volume of the vacuum system and shorten the length of the pipeline system.
5. In addition to smooth and clean surface, scratch free and crack free, the materials used shall also have low permeability, air outlet rate, good heat resistance and oil resistance, as well as certain strength, hardness and elasticity.  

Quotation process

Valve price:

Due to the different requirements of order quantity, packaging and delivery method, and the fluctuation of the price of valve raw materials, the price of valves will have a big difference immediately, so our products have not been marked with prices on the website, please understand.

If you select a valve product on this website and need to know the price or obtain relevant technical information, please contact us. We will reply immediately, and can select appropriate valve products for you according to your requirements, so that your procurement process is easy and pleasant.

Quotation process:

1. Please fax the name (or product model) of the valve you selected, the required order quantity, packaging requirements, delivery time, your company name, your company location and contact information to 021-36311208 Or telephone: 021-60547555。

2. After receiving the customer's purchase list, our company will provide the customer with various services such as valve quotation "price list", model selection "valve model" and technical guidance as soon as possible.

3. Specific matters: delivery date, special requirements, etc.

Ordering Instructions

1、 If the customer has special requirements for the product, the following instructions must be provided in the order contract:
(1) Valve body material (such as plastic, cast steel, stainless steel...)
(2) Connection type (such as flange, thread, clamp, etc.)
(3) Nominal diameter, pipe size
(4) Ambient temperature and pressure range
(5) Power supply voltage, air supply pressure
(6) Fluid properties (including nominal pressure, temperature, viscosity or acid-base)
2、 The company configures various driving devices according to the special requirements of customers. (electric control, pneumatic control)
3、 If the customer provides the determined valve type and model, the customer should correctly explain the meaning and requirements of the model (see the description of valve model preparation for details), and sign the contract on the condition that both the supplier and the buyer have the same understanding.
4、 After the customer tells the required valve model, specification, quantity, delivery time and place, the deposit of 20% of the total amount or the full payment for goods shall be remitted to our company's account in time, and the rest of the payment for goods shall be remitted before shipment, so as to arrange shipment in time.
5、 After the purchase is confirmed, our company will produce in strict accordance with the delivery date. The product processing cycle is generally 3 to 30 days, depending on the type and quantity of the order, and the specific delivery time is subject to the contract. In order to ensure that the goods you ordered are in place in time, please try your best to order earlier.
6、 Our company provides network distribution services according to the needs of customers, delivering goods to the branches (offices) of customers in major cities, and implementing door-to-door delivery services. After the products are accepted, our company will provide after-sales service.