Sullair Water-Cooled Compressor 10B 40HP-251331-003 WC

Warning: Always ensure the compressor is turned off and fully depressurized before starting maintenance.

Replace o-rings and the teflon seat of Blow down valve no.250025-655. Use repair kit no. 250031-772.

Unscrew end caps from the valve body and remove

Hold nut with an appropriate socket wrench and turn screw until loose

Remove all internal parts mounted on the machine screw. Remove the old o-rings and teflon seat and discard

Replace with the new o-rings and teflon seat provided in the repair kit. Apply appropriate lubricant to o-rings and valve body bore

Pre-assemble the internal parts for pilot (P) side of the valve onto the screw and install into the body

Assemble remaining internal parts for inlet (I) side to the screw as illustrated. Once assembled, install the locknut and torque to 25 in.-lbs. (2.82Nm)

Screw end caps into the valve body until tight

Warning: This maintenance check requires trained personnel with PPE!

Remove the appropriate piping from the thermal valve housing

Remove the four (4) capscrews holding the housing together and separate the upper housing from the lower housing

Remove and replace the element seal in the upper housing

Remove and replace the o-ring between the upper and lower housings

Sign off on the compressor thermal valve maintenance

Check the fluid level in the sump. Should the level be low, simply add the necessary amount

Observe the gauges and indicators to be sure they monitor the correct readings for that particular phase of operation

Check on the overall compressor and gauges to assure that the compressor is running properly after it has warmed up

Clean the return line strainer after the initial 50 hours of operation

Clean the return line orifice after the initial 50 hours of operation

WARNING: Before performing maintenance on the valve, be sure that all pressure has been relieved in the compressor sump, and all downstream pressure has been vented to the atmosphere. Also be sure that the components of the compressor are cool to the touch

All pressure relieved in the compressor sump?

All downstream pressure vented to the atmosphere?

Components of the compressor are cool to the touch?

Unscrew the minimum pressure/check valve (P/N 241581) from the receiver cover

Remove the hexagonal retaining cap from the main body

Remove the flat washer and heavy spring from the main body

Tap the piston assembly (with a screwdriver) from the bottom of the main body and remove. The o-ring will now be seen easily

Remove the seal ring and discard

Warning: This procedure requires trained personnel with PPE!

Pressure relieved from the sump tank and all compressor lines?

All piping connected to the sump cover disconnected?

Hex head capscrews from the cover plate loosened and removed?

Cover plate lifted from the sump?

Old gasket material scraped from the cover and flange on the sump?