MNL-093558
September 30, 2008
Page 10
BAUER
COMPRESSORS
CHAPTER 3:
MAINTENANCE
3.1
Pressure Gauges
Observe the pressure gauges daily. If the readings of any of the gauges seem to be incorrect, bleed off
all system pressure. Then, remove the gauge and check for wear and tear, accuracy and proper function-
ing by comparing it to a precision test gauge or a dead weight tester. Replace all broken or damaged
gauges immediately.
3.2
Safety Valve
Develop a regular program of visual inspection, looking for clogged drains and discharge pipe, dirt
buildup in and around the valve seat, and broken or missing parts.
Avoid excessive operation of the safety valve, as even one opening can provide a means for leakage.
Safety valves should be operated only often enough to assure that they are in good working order.
Test the valve every two to six months (depending on the surrounding conditions) by raising the system
pressure to the valve's set pressure allowing it to open and reset as it would in normal service. Do not
hand operate the valve with less than 75% of the stamped set pressure exerted on the underside of the
disc. When hand operating, be sure to hold the valve in an open position long enough to purge accumu-
lated foreign material from the seat area and then allow the valve to snap shut.
Do not paint, oil or otherwise cover any interior or working parts of any safety valve. They do not
require any lubrication or protective coating to work properly.
When safety valves require repair, service adjustments or set pressure changes, work shall be accom-
plished by the manufacturer or holders of “V”, “UV” and/or “VR” stamps.
3.3
Tube Connections
Pipe connections (swivel nuts): Tighten just firmly enough so that leakage is stopped (finger tight plus
up to an additional 1/2 turn as necessary). Please note that the compression type coupling fittings are
capable of exerting extreme force on the tubing and should not be tightened more than is required to
seal the joint. To improve the sealing of the pipe connections and to facilitate installation, the following
should be observed:
1. Apply a thin layer of Never-Seez NSWT or equivalent on the outside of the ferrule during assem-
bly.
2. Lubricate the threads of the connector with Never-Seez NSWT or a similar PFTE base lubricant to
facilitate future disassembly.
3.4
Pressure Hoses
The hoses should be inspected periodically for wear and damage. If a hose is worn or damaged, remove
and replace it.
