Check valve refers to the opening and closing part of the circular disc and by its own weight and medium pressure to produce action to block the medium backflow of a kind of valve. It is an automatic valve, also known as backflow valve or isolation valve.
Disc movement is divided into lifting type and swing type. The lift check valve is similar to the globe valve except for the stem that drives the disc. The medium flows in from the inlet end (lower side) and out from the outlet end (upper side).
The valve is opened when the inlet pressure is greater than the sum of the disc weight and its flow resistance. On the contrary, the valve is closed when the medium is reversed.
Check valves are often used as bottom valves in pumping units to prevent the return of water. Check valve and stop valve combined use, can play the role of safety isolation.
TOTAL SOLUTION ,TOTAL CARE
D&R Machinery are professional confectionery machine manufacturers with over 20 years in the business operating at the highest industry standards.
We've built a reputation on engineering, designing and delivering high performance total-solution confectionery machinery to clients with absolute precision around the world.
The confectionery machinery industry is a small world, and we've slowly become leaders in innovation and creative solutions for clients from all walks of the industry. D&R Machinery has become synonymous with one word and one world only in the confectionery machinery world and that is 'total-solution', that is end to to end turn key production of the highest quality confectionery machinery in the world.
Becoming the D&R Machinery you see today starts and ends with the word 'care'. You don't become the best without a plan that ensures our clients achieve the success they desire, and at D&R Machinery it starts with care and ends with trust, reliability and innovation.
1.Q:Where are your company?
A:D&R office is located at F12, Shanshan Plaza, Yinzhou District, Ningbo, China.
D&R factory is located at Xishanli Village, Qiantong Town, Ninghai County, Ningbo, China.
2.Q:Are you direct factory?
A:We are both manufacturer and trading companiesno one knows more about our products than we do.We can provide the best quality equipment and the most affordable price, and according to your request, we can more quickly provide the corresponding service Scheme.Certainly,We welcome you to come visit our factory.
3.Q:What are your main products?
A:All kinds of chocolate making machines, candy making machines,Swiss roll and layer cake production line, cadny bar production line and their packing machines.
4.Q:Do you have gurantee for your product?
A:As a factory, no one knows more about our products than we do.We have a fairly strict standard for our products.Our products have CE certification and EAC certification.
5.Q:How can we contact you?
A:Here is contact information:
Contact company: Ningbo D & R Machinery Co., Ltd
Direction phone:+86 574 88304275; +86 18057458607