Quinny 65040-AB manual Manual Shutoff Valve, Piping Fit-up

Section III - Installation

Piping Fit-up Pressure Relief Valves

Care must be taken to avoid assembling the piping in a strain with the compressor. Piping should line up without having to be sprung or twisted into position. Adequate expansion loops or bends should be installed to prevent undue stress at the compressor resulting from the changes between hot and cold conditions. Pipe supports should be mounted independently of the compressor and anchored, as necessary, to limit vibration and prevent expansion strains. The piping should never be smaller than the connection on the compressor.

Pressure relief valves are sized to protect the system. Never change the pressure setting or tamper with the valve. Only the relief valve manufacturer or an approved representative is qualified to make such a change.

Manual Shutoff Valve

Install a manual shut-off valve (block valve) to vent the compressor and discharge line to the atmosphere. In those instances where the air receiver tank services a single compressor, the manual shut-off valve can be installed in the receiver. When a manual shut-off valve is used, a pressure relief valve is installed upstream from the manual shut-off valve. These valves should be designed and installed to permit maintenance to be performed in a safe manner. Never substitute a check valve for a manual shut-off valve if the purpose is to isolate the compressor from a system for servicing. If a manual shut-off valve is installed at the service connection, it must be open to allow air to pass to the service line when the compressor is operating. Provide drip legs in the air piping from the compressor as good installation practices dictate.

NOTE

Never operate the compressor with the shut-off valve closed. If the compressor is operated with the shut-off valve closed, a pressure related shutdown will occur.

!WARNING

Relief valves are to protect system integrity in accordance with ANSI/ASME B19 safety standards. Failure to provide properly sized relief valves could cause death or serious injury.

Relief valves are placed ahead of any potential blockage point which includes, but is not limited to, such components as shut-off valves, heat exchangers, and discharge silencers. Ideally, the relief valve should be threaded directly into the pressure point it is sensing, not connected with tubing or pipe. Always direct discharge from relief valves to a safe area away from personnel.

18 Quincy Compressor® - QSD™