Mushroom Check Valve

Mushroom Check Valve, also known as Umbrella Seal Valve and One Way Valve, is a specialized non-return valve featuring a distinctive mushroom-shaped disc that ensures unidirectional flow while preventing backflow. Mushroom Check Valve is mainly made from elastomer rubber like silicone, fluorosilicone & FVMQ, EPDM, HNBR, Buna N & Nitrile Rubber, Neoprene at lower hardness and compression set. Mushroom Check Valve has a in-let and out-let silicone valve & rubber diaphragm, which offers excellent sealing performance with low pressure drop.

Mushroom Check Valve Structure & Working Principle

1. Structural Features:

- Disc (Mushroom Head): The core component, typically circular or conical, made of metal, rubber, or composite             materials.

- Seat: Seals against the disc to ensure tight closure.

- Spring (Optional): Some designs include a spring to assist in closing, suitable for low-pressure or vertical                       installations.

2.Working Principle:

    - Forward Flow: Fluid pressure lifts the disc off the seat, allowing flow.

    - Reverse Flow: When pressure drops or reverses, the disc returns via gravity or spring force, sealing against the seat to        prevent backflow.

Mushroom Check Valve Key Features

1. Fast Response: Lightweight disc ensures quick closure, minimizing water hammer.

2. Excellent Sealing: Mushroom-shaped disc provides tight sealing against the seat.

3. Low Flow Resistance: Full-bore design minimizes pressure drop when open.

4. Durability: Corrosion- and heat-resistant materials available (e.g., stainless steel, PTFE-coated).

Mushroom Check Valve Typical Applications

HVAC & Refrigeration

Chilled Water Systems: Maintains flow direction in cooling loops

Heat Exchangers: Prevents reverse circulation in heating/cooling circuits

Refrigerant Lines: Used in ammonia or Freon systems to protect compressors.

Chemical & Petrochemical Plants

Corrosive Media Handling: Resistant materials (Hastelloy, PTFE-lined) prevent leaks in acid/alkali transport

High-Pressure Reactors: Ensures one-way flow in reaction vessels and distillation columns

Solvent & Polymer Processing: Prevents mixing of incompatible chemicals

Food & Pharmaceutical Industry

Sanitary Process Lines: Complies with FDA/USP standards for hygienic fluid control

CIP (Clean-in-Place) Systems: Prevents contamination during cleaning cycles

Bioprocessing: Used in fermentation and sterile fluid transfer.

Mushroom Check Valve Installation

1.Pull-in type

These are most common and are well suited for hand assembly. To install one places the long tail through a central bore in the seat, pull it and the valve pops in place.

2.Push-in type

These types are preferred when the placing of a long tail in the central bore is more difficult. For example deep in the bottom of a cylinder. Or when the upstream side of the valve is not accessible. For example when placing the valve in the wall of a tank where the inside of the tank is inaccessible. This type can also be used in automatic assembly.

3.Belleville type

The name speaks for itself, the shape of the membrane looks like a Belleville spring washer held by an elastomeric hinge in the centre. And it acts that way. Typically the valve will pop suddenly open once a predetermined pressure is achieved, This is much different from umbrella valves with inverted stem which are more restrictive. The central stem is located downstream of the valve and is held in place by a retainer. This retainer could be a separate component or an integral part of the device in which it is integrated such as a cap or lid just above the umbrella valve. The seat of this type of valve is much easier to manufacture because it has only one flow orifice.

Mushroom Check Valves in Stock

Why Choose Us?

①Decades of experience about precision silicone rubber molding production.

②We can offer high precises designs and sizes for silicone rubber valves to support your devices according to your 3D/2D drawings, samples, flowing parameters etc.

③We have Dust-Free Silicone Rubber Compression Molding Plants and Dust-Free Dismantling Plants.

④According to customer demands, most of silicone medical parts should be produced and finished in clean room. Our dust-free plants can up to 100,000 stage.