Allmand — Maintenance and Adjustment of Pressure Control Valve
Adjustments
From a Allmand service manual — check it applies to your exact model before use.
Procedure
- If discharge pressure drops lower than 51psi(0.35MPa)[3.5bar] during operation, replace spring 3.
- Confirm compressed air in pipes is completely relieved before disassembling.
- Replace O-rings 1 and 2 when deteriorated and/or hardened.
- Replace piston 4 when worn or damaged.
- Run the machine to check function, air-leak or disorder.
Specs & values
- Setting pressure: 58.2 psi (0.4 MPa) [4 bar]
Source: Allmand service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.