What is an excessive flow valve?

An excess flow valve, or EFV, is a device that automatically restricts the flow of natural gas if an underground pipe is broken. When activated, an EFV may prevent the buildup of natural gas and lessen the possibility of personal injury and/or property damage.

Do I need an excess flow valve?

No, Excess flow valves are optional for existing homes. When activated, the excess flow valve may restrict the flow of natural gas, limiting the risk of escaping natural gas due to third-party damage or a pipe failure. Excess flow valves do not protect against gas leaks occurring within your home’s natural gas piping.

Who owns ChemTec?

Viking Pest
Viking Pest Control, an Anticimex company based in Basking Ridge, N.J., has acquired ChemTec Pest Control of Saddle Brook, N.J. Terms were not disclosed, but LR Tullius represented and acted as exclusive financial advisor to ChemTec Pest Control on the transaction.

When should air hoses be fitted with a safety excess flow valve?

If an air hose is more than 1/2 inch in diameter, a safety excess flow valve should be installed at the source of the air supply to shut off the air automatically in case of hose failure.

How does a flow check work?

Flow check valves are controls that prevent hot or chilled water from circulating in the heating or cooling system at certain times. We offer flow check valves (or boiler check valves) that provide positive shutoff when the circulator is not running, preventing the flow of water to radiation units.

Is a EFV necessary?

An EFV is a mechanical safety device installed inside a gas service line between the gas main and the gas meter. Although an EFV is not required for the normal, safe operation of your gas service line, an EFV could help mitigate the consequences of a service line break by restricting or stopping the gas flow.

How does a propane excess flow valve work?

Excess flow valves permit the flow of liquid or vapor in either direction. This flow is controlled in only one direction (each valve is stamped with an arrow). If the flow in that direction exceeds the predetermined flow rate, the valve will automatically close. The valve disk is held in the open position by a spring.

Where is safety valve used?

In steam systems, safety valves are typically used for boiler overpressure protection and other applications such as downstream of pressure reducing controls. Although their primary role is for safety, safety valves are also used in process operations to prevent product damage due to excess pressure.

How does an OSHA valve work?

OSHA valve is a safety device that shuts off air flow to hose in case of excess pressure. Provides safety to the operator and surroundings. Made of heavy-duty steel.

What is the purpose of a flow check valve?

How do I know if my flow control valve is bad?

Symptoms of a Failing Check Valve For example, failing check valves will start to vibrate and even lose some internal parts when problems begin to arise. Other symptoms of check valve failure include reverse flow and excessive component wear and damage. Check valves will also emit noises as they start to break down.