Copeland Refrigeration Compressor D4SJ-3000 D4SJ-300X 4SJH-3000 D6SJ-4000 D6SJ-400X 6SJH-4000 6SJH-400E Valve Plate Assy

Description

Maximize efficiency and reliability with this premium replacement Valve Plate Assembly. Engineered as a direct OEM-equivalent for popular Copeland™ 4SJ and 6SJ series refrigeration and air conditioning compressors, this assembly is the critical component needed to restore sealing integrity and compression ratio, ensuring your system operates at factory-specified performance.

Key Features & Engineering Benefits

• Precision OEM Fit & Function: CNC-machined to exact original specifications, guaranteeing a perfect drop-in replacement without modifications for models like D4SJ-3000, D4SJ-300X, D6SJ-4000, and 6SJH-4000.

• High-Grade Material Construction: The valve plate is manufactured from high-strength, wear-resistant iron or steel, treated to resist corrosion from refrigerant and oil, ensuring long-term durability under continuous operation.

• Optimized Valve Reed Dynamics: The included spring steel valve reeds (suction and discharge) are precisely tempered for rapid response and optimal gas flow, minimizing pressure drop and maximizing volumetric efficiency.

• Superior Surface Sealing: The mating surfaces are precision-ground to a mirror finish, ensuring a perfect, leak-free seal against the compressor cylinder head and block, which is crucial for maintaining system pressure.

• Complete Ready-to-Install Kit: This assembly comes as a complete unit, including the valve plate, suction and discharge reeds, springs (if applicable), and necessary fasteners, simplifying your repair process.

Technical Specifications

Compatible Models & Applications

This Valve Plate Assembly is a direct replacement for a wide range of Copeland 4-cylinder and 6-cylinder compressors. It is specifically designed for models including, but not limited to:

• D4SJ-3000, D4SJ-300X, 4SJH-3000

• D6SJ-4000, D6SJ-400X, 6SJH-4000, 6SJH-400E

*Critical Compatibility Note: Always cross-reference your compressor's full model and serial number before purchase. While this assembly fits the listed models, variations may exist. Verify against your old part. Contact our technical support if you are unsure.

Why Choose This Valve Plate Assembly?

1. Guaranteed Performance: Restores original compression efficiency, leading to lower operating costs and better cooling capacity.

2. Eliminates Downtime: A faulty valve plate causes loss of cooling, reduced capacity, and compressor failure. Our reliable part gets your system back online quickly.

3. Professional's Choice: Trusted by HVAC/R technicians worldwide for its consistent quality, reliability, and perfect fit.

4. Rigorous Quality Control: Every assembly is inspected to ensure it meets strict standards for dimensions, flatness, and material integrity.

Frequently Asked Questions (FAQs)

Q: What are the symptoms of a failing valve plate?
A: Common signs include: poor cooling performance, abnormal compressor noise (clicking or rattling), high suction pressure with low discharge pressure, and reduced system capacity.

Q: Is this an original Copeland part?
A: This is a high-quality aftermarket replacement part engineered to match the original Copeland specifications in form, fit, and function. It provides OEM performance at a competitive price.

Q: Does the assembly include all gaskets?
A: This listing is for the Valve Plate Assembly itself. For a complete repair, we strongly recommend replacing the cylinder head gasket and other related seals. Please check our listing for a full gasket set or contact us.

Q: Do you offer a warranty?
A: Yes, we offer a warranty against manufacturing defects, giving you peace of mind with your purchase.

Shipping 

Global Shipping: We ship worldwide via reliable logistics partners.Satisfaction Guarantee: We are confident in our product quality. Please refer to our returns policy page for details on returns and warranties.

Ready to Execute a Professional-Quality Repair?

Don't let a worn valve plate lead to costly system downtime and compressor damage. Restore your Copedy compressor's reliability and efficiency with this precision-engineered replacement assembly.