2.5 Inch Check Valve

Product Introduction

Product Description

2.5 inch check valve also known as 2.5 inch non return valve, are mostly automatic valves. Check valve is one of the indispensable products in the pipeline system. It is a valve that opens and closes by itself by the flow of the medium itself.

Some of the most common types of 2.5 inch check valve include:

• Ball

• Double Door

• Lift

• Piston

• Stop Check

• Swing

• Tilting Disc

How 2.5 inch check valve works?

Check valves work on the principle of differential pressure. For a check valve to open, it must reach a minimum upstream pressure called the cracking pressure. The cracking pressure will vary depending on the design and size of the check valve. When the upstream pressure reaches the cracking pressure, the valve opens, allowing fluid to enter. When the upstream pressure is lower than the cracking pressure, back pressure is created and the flow tries to move from the outlet to the inlet. At this point, the check valve closes and the flow stops. The closing mechanism of a check valve varies depending on the design and type of valve. Spring or gravity pressure usually aids the closing process.

Knowing the correct installation orientation is critical since check valves only work in one direction. Usually, there is an arrow on the valve housing to indicate the direction of flow. Otherwise, you will need to check the valve to ensure it is installed in the intended flow direction. If it flows backwards, the flow of water will not be able to pass through the system and the build-up of pressure can cause damage.

2.5 inch check valve application

1. Protects media from backflow contamination by gravity, back-siphoning or back pressure.

2. Protects sensitive equipment from damage or contamination due to reversal of water flow.

3. After shutting off water flow, keep water in the system or pipes to prevent drainage or facilitate restarts.

4. Prevents cross flow in systems with unequal line pressures.

5. Reduce the risk of valve fault backflow or leakage.

6. Keep complex systems functioning properly by ensuring one-way flow.

Standard specification of 2.5 inch check valve:

Design and manufacture standard: GB/T 12235-2007

Structure length standard: GB/T 12221-2005

Connection flange standard: GB/T 9113

Pressure temperature grade: GB/T 12224-2005

Test and inspection standard: GB/T 13927-2008

2.5 inch check valve model preparation method: such as H41H-16C in order

Additional number of check valve: HH micro-resistance slow-closing check valve, BH insulation check valve, HQ ball check valve;

(1) Check valve type: H stands for check valve;

(2) Check valve connection: 4 flanges, 6 welding, 7 wafers;

(3) Check valve form: 1 lift type, 2 vertical type, 4 swing type, 6 double flap type, 8 butterfly type;

(4) Check valve seal: B babbitt, F fluoroplastic, H stainless steel, M monel, X rubber, Y carbide, W direct processing;

(5) Check valve pressure: 16 pressure, 16 kg, PN1.6-25mpa, pound class 150LB-2500LB, Japanese class 5K-63K;

(6) Check valve material: Q ductile iron, C carbon steel, P-304, R-316, A titanium alloy, I chromium molybdenum steel;

Why choose us?

Kaifeng High & Middle Pressure Valves Co.,Ltd., is a professional industrial valve manufacturer, well experienced in R&D, production procedure and export business. We are specializing in butterfly valve, check valve, gate valve, Knife gate valve. we have professional support and perfect services.

Our products use advanced manufacturing technology, and strictly conform to API, DIN, BS, EN, ISO, JIS ,GB and other international standards and customized products as well. Our products are widely used in various fields such as marine industry, shipbuilding, petrochemical, metallurgy, water treatment, fire fighting, water supply and drainage, etc. The company has won unanimous recognition and praise from customers with high quality and good reputation.