Small Plastic HDPE Coffee One Way Gas Exhaust Valve For Food Bag Packaging

Working Principle

When the pressure inside the system exceeds the predetermined threshold, the internal force pushes against the seal or diaphragm.

The diaphragm or seal moves away from the valve seat (the area where the seal rests) allowing gas to flow through the outlet port.

This action releases the excess gas from the system.

When the internal pressure decreases or when the external pressure exceeds the internal pressure, the spring or mechanical force pushes the seal back against the valve seat.

The seal closes the valve, preventing any reverse flow of gas back into the system.

The seal or diaphragm must be precisely engineered to ensure a proper seal without leaks. The material’s flexibility and the accuracy of the valve seat are crucial for effective sealing.

Product Description : 

Here’s an overview of the fundamental principles involved in making a one-way gas exhaust valve:

1. Design Concept

Purpose: The primary function of a one-way gas exhaust valve is to facilitate the unidirectional flow of gases. It allows gases to escape from a system but prevents any backflow, ensuring that the system remains safe and efficient.

Mechanism: The valve typically employs a mechanism that opens to allow gas to exit when the internal pressure exceeds a certain threshold and closes to prevent reverse flow when the pressure drops or when the external pressure exceeds the internal pressure.

2. Components and Materials

Valve Body: The main structure of the valve, usually made from durable materials such as metal (e.g., aluminum, stainless steel) or high-grade plastic (e.g., polypropylene, polycarbonate), designed to withstand the specific pressure and chemical conditions of the application.

Seal or Diaphragm: A critical component that forms the one-way barrier. Commonly made from flexible materials such as rubber, silicone, or elastomers, it ensures a tight seal to prevent backflow.

Spring or Mechanical Mechanism: Often included to control the opening and closing of the valve. The spring exerts pressure to keep the valve closed until a specific pressure is reached.

Inlet and Outlet Ports: These are the openings through which gases enter and exit the valve. They are designed to match the connection requirements of the application.

FQA:

Q1: What's your product range?
Plastic cap: all custom design jar with different shape and size.
All blowing and injection plastic items.

Q2: What's material plastic you can do?
Material can be PP, HDPE, PET, PS, 475, PCTG, PETG, LDPE, Triton 1001/2001

Q3: Are you an ended manufacture?
Yes, we had been a professional manufacture .

Q4: Do you sell from stocks?
Yes, If the bottles we don't have, we will make new mold if our clients believe us.

Q5: How should I start with a OEM design( custom design)?
You need to give us a design or a real sample, then we offer to you.

Q6: What do you need to make a new mold for new bottle?
You need to provide the rough shape and size information. Or send us one sample or the draft.

Q7: What information you need to have a quotation?
Your items' height, diameter, weight, material, packaging details, LOGO printing file.

Q8: How long does it take for a mold?
7 days for blowing mold
10 days for injection mold