Piston compressor spare parts

Compatible with mainstream models of Maeda piston compressors.  
It covers the entire MYCOM piston‑type compressor lineup, compatible with common refrigerants such as ammonia, CO₂, R717, R404A, R507, and R22, and suitable for a wide range of applications including seafood cold storage, slaughterhouse cold chains, chemical cryogenics, and blast freezers.

Full-Category Spare Parts Details (Five Major Categories)  
(1) Core components of the main engine (mandatory replacement during overhaul)  
1. Piston Assembly: Includes the piston body, piston rings (compression ring and oil control ring), piston pin, and circlip—manufactured from original‑equipment cast aluminum or ductile iron, offering excellent wear resistance and high‑temperature performance, and precisely matched to the cylinder liner’s inner diameter to prevent refrigerant leakage and maintain compression efficiency.
2. Connecting Rod Assembly: connecting rod, connecting‑rod bearings (big‑end bearing / small‑end bushing), and connecting‑rod bolts; featuring high‑precision alloy bearings that resist heavy‑load wear, thereby eliminating connecting‑rod noise and bearing seizure failures.
3. Crankshaft, crankshaft bearings, and bearing sleeves: Original‑equipment heat‑treated crankshaft; sliding/rolling bearings in stock, suitable for replacement during crankshaft wear or major overhauls.
4. Cylinder components: cylinder liners and cylinder head gaskets: wear-resistant cast-iron cylinder barrels, corrosion‑resistant and suitable for ammonia‑system operating conditions.
(2) Air valve assembly (high-frequency wear part)  
Intake valve disc, exhaust valve disc, valve seat, valve spring, valve plate assembly, and a complete valve repair kit; Qianchuan’s original‑equipment valve discs are made from special stainless steel, offering excellent fatigue resistance and liquid‑hammer protection. They are critical wear parts that determine the compressor’s intake and exhaust efficiency, making them the first choice for replacement when the unit suffers insufficient discharge or backflow of refrigerant.
(3) Lubrication System Spare Parts (Maintenance Consumables)  
1. Oil filter cartridge series: FG214-200, ESD200, OFC-50, MFF400NA—Kawasaki in-line oil filters, external oil filters, and coarse oil strainers (MCN125L/KCYF4). All specifications are available in stock, effectively removing impurities from lubricating oil and protecting crankshaft bearings.
2. Fuel‑supply components: Maeda original gear oil pump (M100P), oil pump sealing gasket, return‑oil check valve, oil sight glass, oil heater, and crankcase heating element.
3. Specialized refrigeration oils: Maeda original‑equipment refrigeration oil, and compatible ammonia‑ and fluorinated‑refrigerant‑specific refrigeration oils.
(4) Sealed Wear Parts (Standard for Leak Repair)  
Shaft seal assembly (crankshaft oil seal), complete machine sealing gasket kit, O‑ring made of fluororubber, cylinder head gasket, end cover gasket: the fluororubber material is resistant to refrigerant corrosion and withstands both high and low temperatures. Complete sealing packages for major overhauls are available as a set, providing one‑stop sourcing to prevent refrigerant leaks and oil seepage; individual gaskets can be custom‑cut to size upon request. Oil–gas separation filter element.
(5) Electrical Control, Valves, and Accessories  
1. Electrical components: pressure relays, temperature protectors, contactors, thermal relays, crankcase temperature control switches, terminal blocks, and motor bearings;
2. Valve accessories: safety valves, check valves, solenoid valves, energy‑regulating unloading valves, capacity‑control spools, and bypass valve components;
3. Auxiliary materials and components: vibration-damping pads, coupling rubber blocks, maintenance manhole gaskets, drain plug caps, and other small maintenance parts.

Product Advantages  
1. Dual sourcing channels: original factory‑direct parts imported from Japan, plus high‑precision domestically produced replacement parts; pricing is tailored to demand, balancing OEM quality with maintenance and repair costs.
2. Local Warehousing in Dalian: Commonly used wear parts (valve plates, filter elements, sealing kits, piston rings) are kept in stock; same-day or next-day shipping within the Northeast region, with expedited delivery within the city.
3. Professional Technical Support: We provide Chuanqian compressor‑specific technical engineers who can accurately verify the model number using the compressor’s nameplate and photos of the old components, thereby preventing incorrect parts purchases. We also offer comprehensive package solutions for overhaul parts.
4. All‑scenario compatibility: Universal components for ammonia refrigeration and fluorinated systems, suitable for new installations, annual maintenance, emergency repairs, and major overhauls.

Supporting services  
1. Components are procured individually as needed, while major overhauls are sourced through bundled centralized procurement.
2. Sourcing spare parts for older Qianchuan models that are difficult to obtain and out of print;
3. Pre-sales technical selection and post-sales technical consultation on component installation.

Spare parts specifications and model numbers  
Spare parts cover all product categories of Qianchuan compressor original‑equipment manufacturer (OEM) components; for certain models, the part specifications and part numbers are provided for reference:

6HK piston compressor

4HK piston compressor

6HS piston compressor