Aug 9, 2022

A check valve basically works as an automatic safety device. Its design permits gases and fluids to flow in a single direction, thus preventing reverse flow. Fluids take entry into the valve when specific pressure is applied. It happens at the inlet where the disc gets out of the valve seat. It then exits through the inlet. 

The flow remains consistent as long as the pressure is maintained. With the drop in the pressure, the disc returns to the seat (automatically) to completely halt the flow. 

The pressure applied to open up the valve ranges between 3 to 350 psi depending on the check valve’s purpose, size, and function. 

In the healthcare industry, numerous medical gas check valves with extensions are used. Use a credible supplier such as Medical Testing Solution to procure these devices. 

Check valves can create tight seals to fight against leaks, along with ensuring that gases/liquids flow in the right direction. By doing so, they shield pumps and compressors from serious damage. 

Check valve names vary according to their applications and the method used to manufacture them. Some of the names include:

  • One-way valves
  • Retention valves
  • Reflux valves
  • Non-return valves
  • Clack valves

The primary function of check valves is to prevent the flow in the reverse direction. If that happens, this can have some serious negative impact on pumps and related mechanisms. 

Check valves can get noisy during operations, which needs to be suppressed. For that, specialized controls must be implemented. 

Check Valve Types

Swing Check Valves

It is a self-actuated valve that serves as a one-direction valve or backflow preventer. The disc present here swings on a hinge from the valve seat to facilitate forward flow. These valves can be highly effective in the likelihood of a water hammer.

Wafer Check Valves

The compact, short, and thin design of these valves make them ideal for complementing compact (small) pipe systems. These can also be used in systems where semi-solid or pure solid media needs to be transported.

Tilting Disc Check Valves

These are mostly used when there is frequent flow reversal. While the disc is set to open, the flow allows it to stay like that.  

Ball Check Valves

Here, balls are used to block the flow that moves in upward and downward directions. The valve seat neatly fits the ball that comprises a conical-shaped chamber to direct the ball to the seat.


It has known by different names, such as split check valve, double disc, folding disc, and dual check valve. The advantage of using this is that it can operate silently, making it ideal for ACs, heating, and ventilation systems. 

Some other types of check valves include lift check valves, silent check valves, duckbill valves, diaphragm check valves, foot check valves, and pneumatic check valves. 

Advantages of Check Valves

  • Prevent reverse flow.
  • Ability to pass through high/low pressure conditions.
  • Work as an efficient safety and backup system.
  • Self-actuated and fast acting.
  • Reduce downtime.
  • Prevent production losses.
  • Fight against water hammer.
  • Low maintenance costs.
  • Few moving components/parts.
  • Work efficiently with variable flow conditions.

Choosing Medical Testing Solutions

We can offer you top-notch quality medical check valves that are individually packed and capped. In addition, each check valve assembly is degreased and washed for medical gas services according to the CGA G-4.1 standards. 

Frequently Asked Questions

Yes, MTS has various partnerships with a number of medical gas installation contractors. Each sub contractor employees qualifying ASSE 6010 Medical Gas Installers ready to meet your needs.
A Medical Gas Certification (Also called a medical gas verification) is an NFPA required inspection and approval of newly installed medical gas delivery systems. All newly in installed medical gas pipeline and equipment must be certified by an ASSE 6030 before use.
Answer: Per NFPA guidelines, it is a requirement for any facilities using medical grade gases for the purpose of human consumption to have their gas delivery systems inspected by and ASSE 6040. Read more about Medical Gas Inspections Here.
Answer: Yes, MTS provides annual medical gas inspections. We provide discounts on Annual Inspections when you sign multi year contracts. Read more about Medical Gas Inspections Here.
Answer: The Plumbing and Mechanical Systems Board issues medical gas piping certification to medical gas system installers who possess valid certification from the National Inspection Testing Certification Corporation or NITC. Certification from other organizations may be considered with approval of the board.
Yes, we can adapt any fittings to the desired hosing for any medical grade gas. High pressure gases such as Nitrogen can also be accommodated.
Yes, Those items for shipment to countries outside of the U.S. may be subject to taxes, customs duties and fees levied by the destination country (“Import Fees”). The recipient of the shipment is the importer of record in the destination country and is responsible for all Import Fees.
With respect to each item for which Import Fees have been calculated, you authorize Export or Merchant (as applicable) to designate a carrier (“Designated Carrier”) to act as your agent with the relevant customs and tax authorities in the destination country, to clear your merchandise, process and remit your actual Import Fees for such item.
Import Fees Deposit” represents an estimate of the Import Fees that will be levied on the items in your order for shipment to countries outside of the U.S. By placing your order, you agree to allow Export and/or Merchant (as applicable) to collect the Import Fees Deposit for the applicable items in your order. This deposit will be used, on your behalf, to reimburse the Designated Carriers for the import fees that they have paid on your behalf to the appropriate authorities of the destination country.
Answer: Per NFPA guidelines, it is a requirement for any facilities using medical grade gases for the purpose of human consumption to have their gas delivery systems inspected by and ASSE 6040. Read more about Medical Gas Inspections Here.

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