
Used as ventilation, shut-off or high-vacuum valves, butterfly valves have a
simple structure, and can be installed in the vacuum exhaust line of a
semiconductor tools. Butterfly Valves are characterised by their compact design,
and high conductance. Made of stainless steel 304 or 316L, these valves are also
available manually operated or electro pneumatically.
Design and Feature
·Swivel valve plate with FKM seal
·Compact size and light weight,easy installing
·Minimal face-to-face dimension,Minimal installing space
·Flow by adjusting the degree of opening and can be set to an arbitrary degree
of opening.
Technical Parameters
·Valve Body Material:SS304/SS316L
·Seat Seal Material:FKM, NBR in option
·Vacuum Range:10^5 -6.7x10^(-5) Pa
·Leak Rate:1.3x10^(-5) Pa. L/s
·Cycles Until Service:100,000 Times
·Angle Opening:0-90 Degree
·Temperature Range:(1)FKM Seat Seal:-30°C to 150°C (2)NBR Seat Seal:-25°C to 80°C
·Operated:Manual, Pneumatic Actuator, Electric,Actuator
·Compressed Air:0.4-0.8Mpa
·Opening/Close Speed:(1)Aluminium Actuator:≤3S (2)Electric Actuator on-off type:Standard 30 S. 10S, 15S option
·Solenoid Voltage:AC220V,50Hz,6W or on request
·Standard Electric Actuator:On-off type
·Available with Position Indicator:Optional signal feedback
Product Name: | KF One Way Quick Check Valve Stainless Steel Non-Return Vacuum Valve KF Flange |
Material: | SS304/SS316L |
Size: | KF16-KF50 |
Min. Relief Pressure | 30mBar |
Leak Rate | 1.3 x 10-6 Pa L/s |
Seal Gasket | FKM,NBR |
Leak Rate | -30°C to 150°C |



QiMing mainly manufacture and export SS valves and fittings including Butterfly Valve, Ball Valve, Check Valve, Angle Valve, Vacuum Valves, Tri Clamp Fittings, Weld Fittings,KF/NW flanges, ISO Flanges and CF Flanges.
QiMing has Mazak CNC, Milling CNC, handheld spectrometer,helium mass spectrometer leak detection, roughness tester and others. With more than 10 years development, QiMing gets 3A certificate and ISO9001:2008. QiMing's main market is Europen, USA, Korea,Japan and so on.
QiMing's goal: Innovation, Dedication, Service, Win-Win.


Our products are exported to many countries, including South Korea, the United States, the United Kingdom, ltaly, France, the Netherlands, Finland, Russia, Belarus, Thailand, CanadaMexico, Australia, Germany, Spain, Malaysia, Singapore, Vietnam, Indonesia, India, thePhilippines, Japan, Paraguay, Brazil, Chile, Peru, and more.
Our experienced engineers work closely with each customer to find out the best possible solutions.Our constant technical innovation combined with stringent quality control systems hasenabled us to deliver high performance and outstanding value in sanitary applications.We are dedicated to improving the performance and value of our products, services, and
solutions to meet your requirements


QiMing has advanced CNC machieries,CNC centers and Testing Equipment,ISO9000 Certificated and all raw materials are traceabletheablethe


Q: Why would I choose you?
Wenzhou QiMing Stainless Co., Ltd has been engaging in manufacturing sanitary valves, fittings, tank components and pumps for over 15 years, outstanding in production capacity, effective management, accurate lead time, on-time shipments and problems-solving rate after sales.
Q: May I have free samples before ordering?
Yes, our company is very pleased to send you free samples for quality test as long as freight cost being paid by buyers themselves.
Q: What's the MOQ?
The majority of products are fully in stock, so we accept 1 piece as the minimum order quantity.
Q: Does your company have the export license?
Yes, we have more than 4 years export experience, we can do FOB, C&F, CIF, DDU and DDP (Russian Only).
Q: What's the payment term?
For small testing orders, we accept Paypal, Western Union, T/T and Credit Card.
For mass orders, we accept T/T and L/C.
Q: How would you minimize damages during delivery?
Standard: mass orders will be packed by many carbon boxes and filled in plywood cases.
Available requirement: blister packing for every piece of product, plastic caps for clamp connected products.
Q: How would you choose the shipment way?
Basically, we will select shipment ways based on four factors (order quantity, delivery time, costs and customs policy), then list couples of reasonable options with Pros and Cons to customers, letting them to decide.