Silicone Valve

Silicone Valve

Silicone valve is including one-way valves and pressure relief valves such as duckbill valves and umbrella valves,etc.These bidirectional and one-way silicone valves could open and close at predetermined forces and vacuums and are used to dispense liquids, gases, and powders.

One-way valve

One-way valve components are used to create a unidirectional flow in a device. They are in fact elastomeric sealing elements that allow forward flow and prevent backflow. There are different designs. If you like low opening pressure and ease of assembly then the first choice would be a duckbill valve. If you need a certain cracking pressure or a low-pressure drop at higher flows then an umbrella valve would be our recommendation.

One-way valves are used to facilitate a unidirectional flow of fluid. Depending upon the application this either causes a forward flow or prevents backflow in a device. Our flapper, umbrella, duckbill and custom valves are produced from a wide variety of rubber compounds, including medical and food-grade silicone and hydrocarbon-resistant fluoro silicone rubber in order to handle a broad range of tolerances and temperatures.

All one-way rubber sealing valves allow fluid, either a liquid or a gas, to flow through it in only one direction. The design and structure of one-way check valves make them widely applicable in pressured fluid environments. The elastomeric compound offers itself to be low-maintenance, rust-free, and highly responsive to very subtle pressure changes.

Silicone Pressure Relief valves

Silicone Pressure Relief valves are used for controlling the direction of flow of a fluid. Designs can include umbrella valves, duckbill valves,  Belleville Valves and diaphragm valves etc.

Pressure Relief valves can be designed to provide the customer’s required head loss and flow rate for particular applications.

A range of materials and designs are available to handle different fluids and service conditions.

Pressure Relief sealing valves are used to facilitate a unidirectional flow of fluid. Depending upon the application this either causes a forward flow or prevents backflow in a device. Our flapper, umbrella, duckbill and custom valves are produced from a wide variety of rubber compounds, including medical and food-grade silicone and hydrocarbon-resistant fluorosilicone rubber in order to handle a broad range of tolerances and temperatures.

Pressure Relief rubber sealing valves allow fluid, either a liquid or a gas, to flow through it in only one direction. The design and structure of one-way check valves make them widely applicable in pressured fluid environments. The elastomeric compound offers itself to be low-maintenance, rust-free, and highly responsive to very subtle pressure changes. 

Silicone Flap Check Valve

Applications 

The  flap check valve accomplish this by containing a hinged flap or disk that swings in one direction only and are obviously used as a foot support. In the first case they offer the advantages of adhesion to the surface and vibration damping that no other material can reach. In the case they are used as end stroke buffers, they offer excellent durability and flexibility.

Material of flap check valve:

The standard material for the flap check valve is the rubber SBR, a material that combines excellent mechanical properties to those of duration. Production in other materials should be considered in cases in which the article is used in different conditions from normality, in terms of temperature and contact with aggressive substances.

Silicone umbrella valves 

Silicone umbrella valves have been around for many years, Their applications include vessel vent valves such as for automotive fuel tanks, in- and outlet valves for piston- and diaphragm pumps, one-way check valves in (disposable) breathing masks, and numerous other fluid control functions in medical devices, home appliances, cars and toys.

Umbrella valves are elastomeric valve components that have a diaphragm shaped sealing disk or an umbrella shape if you like. These elastomeric components are used as sealing elements in backflow prevention devices or one-way valves or check valves, in vent valves or pressure relief valves and in metering valves. When mounted in a seat, the convex diaphragm flattens out against the valve seat and absorbs a certain amount of seat irregularities and creates a certain sealing force. The umbrella valve will allow forward flow once the head pressure creates enough force to lift the convex diaphragm from the seat and so it will allow flow at a predetermined pressure in one way and prevent back flow immediately in the opposite way. 

The main advantage compared to other types of valves such as spring loaded disc valves is that an umbrella valve uses its elastic material properties and its preloaded convex shape to create the sealing force against the seat and that it uses the central stem to hold the component in place so as to avoid the need for additional components such as a spring and the need for a central or circumferential disc positioner(s). This simplifies the design of the assembly and makes the valve adaptable to minimal space, reduces the number of pieces in a valve, simplifies assembly and last but not least is very cost effective.

Other not less important benefits include:

1)immediate positive seal,

2)position independent, 

3)variable opening pressure trough seat thickness, 

4)high flow rate vs. package size, 

5)corrosion resistant, 

6)wear resistant 

7)very cost effective.

Silicone Duckbill Valve

Silicone duckbill valves are unique, one-piece, elastomeric components that act as backflow prevention devices or one-way valves or check valves. They have elastomeric lips in the shape of a duckbill which prevent backflow and allow forward flow. 

The main advantage of duckbill valves over other types of one-way valves is that duckbill valves are self contained i.e. the critical sealing function is an integral part of the one piece elastomeric component as opposed to valves where a sealing element has to engage with a smooth seat surface to form a seal. 

Therefore duckbill valves are easily incorporated and assembled into a wide variety of devices without the hassle or problems associated with the surface finish quality of mating seats and/or complex assembly processes.

Other not less important features include:

Position independent,

Low opening pressure- immediate free flow,

1) Non-tortuous flow path,

2) High flow rate vs. package size,

3) Virtually no internal volume and dead space,

4) Particle compliant,

5) Corrosion resistant,

6) Wear resistant and

7)very cost effective.