Lift type flanged check valve






 
The valve is opened/closed by the valve disc moving in a direction parallel to the valve seat hole axis and can only be installed on horizontal pipelines with the major function of preventing medium backflow when shutting down the pump and maintaining the water column required by pumping.

Design:
Design standard as per: BS1868, ASME B16.34, GB/T 12235.
Compact and reasonable product structure, reliable tightness and good performance;
Lift piston type disc;
Rapid closing and flexible actions of the valve disc
Small closing impact, water hammer is not liable to be generated;

Description
Bolted Bonnet; Swing and lift disc; Metallic seating surfaces.

Body and Bonnet Connection
The body and bonnet of Class150~Class900 check valves are usually with studs and nuts. And the body and bonnet of Class1500~Class2500 check valves are usually of pressurized seal design.

Body-To-Bonnet Joint
Stainless steel + flesible graphite wounded gasket is used for Class 150 and Class 300 check valve; Stainless steel + flexible graphite wounded gasket is used for Class 600 check valve, and joint gasket is also optional for Class 600 check valve; Ring joint gasket is used for Class900 check valve; Pressurized seal design is used for Class 1500~Class 2500 check valves.

Seat
For carbon steel check valve, the seat is usually forged steel. The sealing surface of the seat is spray welded with hard alloy specified by the customer. Renewable threaded seat is used for NPS<10 check valves, and welded on seat can be also optional if being requested by the customer. Welded on seat is used for NPS>12 crbon steel gate valves. Forstainless steel check valve, integral seat is usually adopted, or to weld hard alloy directly integrally. Threaded or welded on seat is also optional for stainless steel check valve if being requested by the customer.








FAQ

1 Are you a factory or trading company?
We are a factory specialized in manufacturing valves and fitting over 10 years.
And we have got the verification of compliance for ball valve from ECM and ISO9001 certificate of manufacturing and processing of valves and fittings.

2 Where are the main markets for your products?
We hope to make business with companies from all over the world. And for now, our valves and fittings have been exported to especially in North America, South America, South Asia, Europe and Middle East.

3 Do you have a minimum quantity of the products?
No, we will build business with you with even 1pc. We believe this cooperation will be a long-term relationship for our high quality, competitive price and good after-sale service.

4 Are samples available to be sent with free?
It depends on what product you need. There are hundreds of products we sell. You can contact us for particular answer.

5 Can you print our Logo on the valves?
Yes, we can totally produce products according to your this kind special request, even manufacture it based on your drawing.

6 What is your lead time?
It's around 30 days normally. If we have the products in stock, it will be about 15days

7 How can I check your factory situation while it's difficult for me to come to China?
We have photos and videos on our website and face book, It shows every step of the manufacturing.
We also have a showroom in CA, USA. If you have time, you can take a look.

8 How can you guarantee the quality of products?
First of all, we have the numerical control device to manufacture products accurately. Then our quality inspectors will test products one by one to make sure every valve or fitting we sell is qualified.

9 How long is the quality guarantee period?
We supply 6 to 12 months for quality guarantee according to customers' using frequency.

10 How do you pack?
1.Plastic bags→2.Paper box→3.Cartons→4.Plywood Case