Copeland 998-0661-41 Valve Plate Kit

The Copeland 998-0661-41 Valve Plate Kit is the OEM-specified rebuild kit for the 9RS1, 15 HP Copelametic semi-hermetic compressor — a three-phase, 9R-body reciprocating compressor rated for medium- and high-temperature commercial refrigeration on R-22 and R-502. It restores suction and discharge valve sealing when reed valves wear, crack, or lose tension, which shows up in the field as reduced capacity, elevated head pressure, or a compressor that short-cycles under load. The kit contains the machined valve plate, suction and discharge reed valves, reed pins, and the seating gaskets needed for a complete valve-section rebuild; the matching 998-0669-37 complete gasket set covers the head-to-crankcase seal on the same 9R/9RS body if that gasket is also being replaced during the same service call. Because the 9RS1 platform predates HFC refrigerants, this kit is built for use with mineral oil systems — do not introduce POE oil into an R-22/R-502 charge without a full retrofit.

Key Benefits

• Exact 9RS1 Fit: Machined and specified by Copeland for the 9RS1, 15 HP compressor body — not a universal or cross-fit part.
• Complete Valve-Section Rebuild: Valve plate, suction and discharge reeds, reed pins, and gaskets in one kit — no separate ordering for reed pins or seating gaskets.
• Restores Lost Capacity: Corrects the head-pressure rise and capacity drop that worn or fractured reeds cause on 9R-body compressors.
• Pairs With 998-0669-37: The correct companion gasket set for a full head-to-crankcase reseal is a known, documented pairing — not a guess.
• OEM Manufacturing: Built to Copeland's original tolerances, so valve timing and seating match factory specification rather than an aftermarket approximation.

Common Questions

• What compressor does this fit? The Copeland 9RS1, 15 HP semi-hermetic reciprocating compressor (Copelametic 9R body).
• What refrigerants and oil is this rated for? R-22 and R-502 systems using mineral oil — this is a legacy CFC/HCFC-era platform, not rated for POE oil or HFC blends without a documented retrofit.
• Do I need the gasket set separately? The valve plate kit includes its own seating gaskets. If you're also resealing the head-to-crankcase joint, order the companion 998-0669-37 gasket set separately.
• What symptoms indicate this kit is needed? Reduced cooling capacity, rising head pressure, or short-cycling on a 9RS1 compressor usually point to worn or fractured suction/discharge reeds — this kit addresses that directly.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.