My valve is losing too much air, what could be the problem?

Too much clearance between the rotor, endplates, and/or housing can result in air loss. Measure the rotor-to-endplate and rotor-to-housing clearances to confirm that they are an NFPA compliant 0.0079 inches. If the clearance is larger than this, it might be time to replace your rotor, rotary valve, or have it sent back to ACS Valves for a repair or evaluation. Make sure to stick to a maintenance schedule and check your clearances at least every three months.