Product Introduction

The duckbill valve, also known as the rubber blowdown check valve, rubber check valve, etc., is a flexible rubber check valve without any moving components.

It is mainly made of elastic neoprene rubber and man-made fibers through special processing, and its shape resembles a duck's bill, hence the name.

The design principle of the duckbill valve is based on the fact that when there is no internal pressure, the duckbill outlet closes under its own elastic action; As the internal pressure increases, the duckbill outlet increases to keep the liquid drained at high flow rates.

This valve does not have any moving components, so it is free of any maintenance, and is widely used in coasts, beaches, docks, reservoirs, municipal flood discharge, sewage and other fields, and is known as an environmentally friendly green valve.

Operating principle

1. The liquid passes through the valve, and then the valve is opened.

2. When the flow or pressure increases, the opening amplitude of the duckbill valve will increase with it, and if the water flow stops, the anti-water pressure or atmospheric pressure will press the duckbill valve tightly to prevent the liquid or odor from flowing back.

3. The pressure required for the lifting of the duckbill valve is not very large, and the valve can be opened with a water level difference of 250 Pa inches.

Product Applications

1)Water conservancy engineering: Used for sluices, ship locks, water discharge culverts, etc., to control the flow of water, prevent waste of water resources, and reduce the impact of floods.

2)Sewage treatment: Installed at the inlet and outlet of sewage pipes and the inlet and outlet of sewage treatment plants to prevent sewage leakage and protect environmental safety.

3)Urban drainage system: Ensure that the urban drainage system is unobstructed during daily stormwater drainage and extreme weather conditions.

4)Farmland irrigation system: Control the flow and direction of irrigation water flow to improve irrigation efficiency.

5)Ship building industry: Used for the drainage and ventilation of the ship's hold to ensure the safe operation of the ship.

6)Coasts, beaches, wharves, reservoirs: Used for municipal flood drainage, sewage discharge, preventing blockage of sediment, silt, etc., and maintaining a clean environment.

Main connection size

FAQ

Q: Are you a trading company or manufacturer?

A: We are a manufacturer of duckbill valves, rubber expansion joints, bellows, flange adapters and flanges with more than 20 years of experience.

Q: What is your packing method?

A: It is first wrapped in plastic film, then packed into a carton and then packed into a wooden case. It can also be customized according to customer requirements.

Q: What is your rubber made of?

A: We have natural rubber, nitrile rubber, EPDM rubber, etc.

Q: Can the height of the duckbill valve be customized?

A: Of course, we have molds of different specifications and sizes, which can be made according to your requirements.

Q: How long is your delivery time?

A: It depends on the quantity, but usually no more than 20 working days.

Q: What is the clamp of the duckbill valve?

A: Stainless steel 304 and 316.

The company adheres to the business philosophy of "customer satisfaction is our first duty, all employees are responsible for creating quality, continuous improvement sets new heights, honest service builds reputation", and wholeheartedly provides high-quality products and professional services to new and old customers.

The factory mainly produces rubber expansion joints, duckbill check valves, dismantling joint, bellow expansion joints, compensators, repair clamp, 02S404 national standard waterproof casings, gate valves ,butterfly valves etc; and all products have passed ISO 9001:2015 quality management system certification; adopting national and industry standards, advanced manufacturing technology, strong R&D and manufacturing capabilities, they are widely used in water supply, drainage, electricity, chemical industry, gas, metallurgy, urban construction and environmental protection and other pipeline industries.