Range Guard Valve Body Rebuild Kit 120046

The Range Guard UCH Valve Body Rebuild Kit (P/N 120046, full part number 87-120046-001) contains the internal service components needed to rebuild the cartridge receiver valve body on the Range Guard UCH (Universal Control Head). The cartridge receiver valve is the component that the nitrogen actuation cartridge seats against and punctures when the system fires, releasing pressurized nitrogen through the actuation circuit to open the agent cylinder valve and initiate discharge. Like any valve that is punctured during actuation, the receiver valve's internal seal and structural components are exposed to the full actuation pressure and must be rebuilt before the control head can be returned to service with a new live cartridge.

A rebuild kit is also used when the valve body shows wear or seal degradation during inspection, even if the system has not recently discharged. Over years of standby service in a commercial kitchen environment, the valve body is subject to heat, grease, and humidity exposure that can degrade internal seals. A rebuild during scheduled maintenance restores the valve to proper specification without replacing the entire control head.

Range Guard systems are pre-engineered systems under NFPA 17A. Valve body rebuild work must be performed by a certified Range Guard distributor. The rebuilt valve must be tested for correct function before a live actuation cartridge is installed and the system is returned to service.

• Post-Discharge Rebuild: Any time the system discharges with a live cartridge, the cartridge receiver valve body should be rebuilt before a new cartridge is installed and the system is returned to service.
• Inspection-Triggered Rebuild: If a certified technician identifies seal degradation or valve wear during semiannual inspection, the valve should be rebuilt with this kit rather than waiting for a service failure.
• OEM Kit Only: Use only P/N 120046 for the UCH valve rebuild. Generic seal kits have not been tested with the Range Guard UCH design and their use voids the system's listing.
• Post-Rebuild Testing: After rebuilding, the technician uses a test cartridge (P/N 120044) to verify the rebuilt valve actuates correctly before installing a live cartridge.

Is this kit for the UCH only, or does it also work with older control heads?

This kit (P/N 120046) is specifically for the UCH (Universal Control Head). Older Range Guard A-plus control heads use different internal components. Confirm your control head model with your certified Range Guard distributor before ordering.

Can I skip the rebuild if the system only did a test discharge with the nitrogen test cartridge?

A test discharge using the nitrogen test cartridge (P/N 120044) exercises the actuation mechanism but typically does not require a full valve rebuild the way a live chemical discharge does, since the test cartridge pressure is lower and no chemical agent passes through the valve. Consult your certified Range Guard distributor to confirm whether a rebuild is required after a test discharge in your specific system configuration.

How often should the valve be rebuilt even without a discharge?

A rebuild is triggered by inspection findings rather than a fixed calendar interval between discharges. A certified technician inspects the valve body at each semiannual service visit and recommends a rebuild if seal condition or valve wear warrants it.