ISO Flanges / Flange Check Valve / Screw End Check Valve

August 24, 2025

ISO Flanges / Flange Check Valve / Screw End Check Valve
ISO Flanges / Flange Check Valve / Screw End Check Valve 

  1. Brief Introduction
This series of valves is suitable for the start and stop of ultra-high vacuum systems. They are two types of vacuum block valves—manual and pneumatic. These valves offer numerous advantages such as stability, durability, excellent sealing, and long service life, making them a preferred choice in ultra-high vacuum equipment. Manual valves use a rotating handle to operate, while pneumatic valves rely on compressed air. When the air source is lost, the valve plate closes automatically due to spring force. The applicable media include pure air and non-corrosive gases.                               
  1. Features
  1. Designed in a standard and modular way for easy replacement and maintenance.
  2. Easy to clean and maintain.
  3. Equipped with stainless steel bellows and Viton O-rings, no lubrication required.
  4. The internal body of the valve is welded with stainless steel, ensuring a low leak rate.
  1. Order Information
Each product has its own order number. Customers can search based on the valve's operation mode and DN size. For example: 2089 refers to High Vacuum Manual Block Straight Valves, DN=16mm, CF flange.
DN
(mm)		 Order No. Weight/kg
Manual Pneumatic Manual Pneumatic
16 2089 2297 0.50 0.70
25 2090 2298 1.80 1.70
40 2091 2299 2.20 2.10
50 2092 2300 2.70 3.55
  1. Major Capacity Targets:
  1. Application range: 1×10⁻⁶ Pa ~ 1.2×10⁵ Pa
  2. Differential pressure before opening: ≤1.2×10⁵ Pa in any direction
  3. Leak rate of valve body and base: < 1.3×10⁻⁷ Pa·L/s
  4. Cycles before first maintenance: 200,000 times
  5. Baking temperature: Open ≤200°C; Close ≤150°C
  6. Installation position: Any direction
  7. Power supply: AC 220V 50Hz, 6W or DC 24V, 3W (cycles until first service)
  8. Compressed air (for pneumatic valves only): 0.4~0.7 MPa
  9. Speed of opening/closing (pneumatic valves only): ≤1s
  10. Valve position indication
- Manual valves: Indication of open and closed positions's positions
- Pneumatic valves: Indication of open and closed positions (magnet switch)
  1. Valve weight: Refer to the table above.
  1. External Dimensions
  1. Manual
            
Model DN Connecting
flange		 Manual
A B C D E F G
CD-J16B 16 CF16 106 16 40 48 64 40 28
CD-J25B 25 CF25 137 25 55 69 89.5 50 40
CD-J40B 40 CF35 153 35 63 69 97.5 63 40
CD-J50B 50 CF50 192 50 80 92 126 63 40
  Pneumatic 
 
Model		 DN Connecting
flange		 Pneumatic
A B C D E F G
CDQ-J16B 16 CF16 125 16 40 48 85 113 28
CDQ-J25B 25 CF25 149 25 55 69 111 140 40
CDQ-J40B 40 CF35 167 35 63 69 118 150 40
CDQ-J50B 50 CF50 207 50 80 92 144 210 50
 
 
CF flanges comply with GB/T 6071-2003.
Optional Parts: Magnet switch.

We can provide OEM and ODM services based on your drawings and requirements.
ISO Flanges / Flange Check Valve / Screw End Check Valve

Packaging & Delivery

Packaging Details: Inner: plastic bag. Outer: carton or wooden case, or according to customer requirements.
Delivery Detail: Shipped within 3 days after payment

Our Company Introduction

Chuanbei Vacuum Technology (Beijing) Co., Ltd. (Registered Brand CBVAC), founded in 2002, is a national high-tech enterprise and a key member of the Chinese Vacuum Association. It specializes in the development, design, production, sales, and service of vacuum products. The company has undertaken major projects from the Ministry of Science and Technology, intelligent digital workshops from the National Development and Reform Commission, and technology upgrades from the Ministry of Industry and Information Technology.

CBVAC offers various series of vacuum valves, vacuum pumps, vacuum bellows, vacuum flange connectors, custom chamber processing, vacuum system integration, and other vacuum products. These belong to the high-end equipment manufacturing industry and are widely used in new energy, new materials, aerospace, semiconductors, IC equipment, and other fields. We also design and manufacture vacuum technology applications for universities and research institutions.

Our Product Range
ISO Flanges / Flange Check Valve / Screw End Check Valve
 

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