Introduction

The check valve is a valve that opening and closing member is a circular flap and acts on its own weight and medium pressure to block the flow of the medium. The flap motion mode is divided into lift type and swing type. The lift check valve is similar in construction to the shut-off valve and lacks only the valve stem that drives the flap. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). When the inlet pressure is greater than the sum of the valve weight and its flow resistance, the valve is opened. Conversely, the valve closes when the media is reversed. The swing check valve has a valve that is inclined and rotatable about the shaft, and operates in a similar manner to the lift check valve. Check valves are often used as bottom valves for pumping devices to prevent backflow of water.

Size Chart

Technical Specification

Design Standard: AWWA C508

Norminal Pressure:300PSI

Working Temp: -20°C~110°C

Flange Standard: ANSI B16.1 Class 125

Both inside and outside of the body need Epoxy Resin Coating

Winan Industrial Limited

The Winan Industrial Limited. (WINANF FIRE) was set up in 1995 with registered capital of 13,680,000RMB. We specialized in manufacturing and installing fire fighting equipment for more then 20 years and we devote to provide our clients with high quality and reliable products.

The company now has a large area of industrial workshops of more than 15000 m2. We possess all kinds of advanced producing equipments, sophisticated manufacturing process and modernized testing center. WINAN FIRE got the ISO9001: 2000 Quality Management System Certificate in 2001 and got the CCCF Product Quality Certificate in 2004. We are the member of China Fire Protection Association. Products made by WINAN FIRE have won a number of clients from all over the world after decades of innovation and we believe that we can do better in our industry!

When a fire happened, thousands of people involved in the disaster. Some of them lost there homes and families. However, many of the tragedy happened attribute to the the lack of preventive measures.

You can see that many buildings, public places and factories don't have a sound fire-fighting system to prevent a fire disaster. They don't have necessary fire-fighting equipment, there is few relevant personnel who has got professional training. All of this lead a tragedy once a fire happened.

Fortunately, we are here to protect your home and family. The Shenzhen Winan Industrial Development Co., Ltd. (WINAN FIRE) is a fire equipment manufacturer from China in Shenzhen city, who was set up in 1995. We specialized in manufacturing all kinds of fire equipment. Our main products contain foam system, fire monitors, water mist system, valves and foam concentrate.

With a history of more than 20 years, our professional team has rich experience and perfect technique. It is our responsibility to provide product of good quality for our customers. Do not let the tragedy happen again, it's never too late to do something. We are here to be with you, to protect your family and home!