Sabroe SMC-108 Solenoid Valve Danfoss EVRF 032F3141

Genuine Sabroe SMC-108 Compressor Solenoid Valve – Danfoss EVRF 032F3141

The genuine Danfoss EVRF 032F3141 3-way solenoid valve serves as the hydraulic pilot capacity regulator specifically engineered for Sabroe reciprocating refrigeration compressors. Installed directly onto the compressor cylinder unloader mechanism or side-mounted control block, this servo-operated valve directs pressurized lubrication oil into the hydraulic cylinder unloader pistons.

Energizing the valve ports oil to actuate the push rods that lift suction valve plates off their seats, effectively deactivating specific cylinder banks to achieve stepless or stepped capacity regulation (0%–25%–50%–75%–100%). Designed to handle severe mechanical vibrations, heavy pressure pulsation, and wide thermal differentials encountered aboard ocean-going reefers, LPG/LNG carriers, container vessel provision plants, and land-based cold-storage facilities.

Model Details

• Manufacturer / OEM: Danfoss A/S (for Sabroe / Johnson Controls)
• Danfoss Valve Type: EVRF 3-Way Pilot Solenoid Valve
• Manufacturer Part Number (MPN): 032F3141
• Assembly Type: Direct-acting / servo-assisted 3-way capacity control spool assembly
• Primary Media Compatibility: R717 (Ammonia/NH₃), HCFC (R22), HFC (R134a, R404A, R507, R407C), and synthesized POE, PAG, Alkylbenzene, and Naphthenic mineral refrigeration oils

Features

1. Direct OEM Hydraulic Unloader Control: Calibrated internal flow channels provide hydraulic pressure modulation to the cylinder unloading pistons on Sabroe reciprocating heads without pressure hunting.
2. Extreme Mechanical Durability: Precision-machined, corrosion-resistant valve body withstands continuous compressor block vibrations up to 4g and peak operating pressures up to 42 bar (610 psig).
3. Universal Media Resistance: Fitted with chemical-resistant PTFE/HNBR internal seats and seals, rated for dry ammonia vapor, fluorinated refrigerants, and aggressive synthetic polyolester oils.
4. Industrial IP65/IP67 Electrical Interface: Designed to accept heavy-duty Danfoss clip-on and terminal-box coils (10W–20W AC/DC) through standard DIN 43650-A connectors with integrated moisture seals.
5. Fail-Safe Internal Return: Precision mechanical spring-return ensures immediate venting of hydraulic unloader oil back to the crankcase upon de-energization, guaranteeing loaded startup protection.

Equipment Compatibility

• Sabroe Reciprocating Compressors:
  • SMC Series: SMC-104, SMC-106, SMC-108 (S, L, and E variants)
  • SMC Mark 2 & Mark 3 Series: SMC 104 Mk3, SMC 106 Mk3, SMC 108 Mk3
  • SMC-112, SMC-116 multi-cylinder configurations
  • CMO Series: CMO-14, CMO-24, CMO-26, CMO-28 (oil unloader configurations)
  • Sabroe TCMO and TSMC two-stage reciprocating blocks
• Sabroe / Frick Screw Compressors:
  • Sabroe SAB-120 and SAB-151 (Vi and step-capacity pilot block manifolds)
  • Frick XJF / XJS series screw units utilizing Danfoss pilot blocks
• Compatible Refrigeration Control Units:
  • Sabroe UniSAB II, UniSAB III, and UniSAB 4 PLC monitoring systems

Part Number Cross-References

• Danfoss Ordering Code: 032F3141 / 032F314132
• Sabroe / Johnson Controls Part Numbers: 1372-424, 1372-424-00, 347600-03
• Alternative Related Danfoss References: 032F3144, 032F3145, 032F3146 (EVRF capacity regulator family variants)
• Compatible Danfoss Coil MPNs: 018F7363 (230V 10W BB230CS), 018F7360 (110V 10W BB110CS), 018F6701 (24V 10W BB024CS), 018Z6182

Applications

• Marine Provision & Cargo Refrigeration: Regulating cooling capacity on multi-temperature reefer vessels, LPG transport chillers, and fishing trawler RSW (Refrigerated Sea Water) systems.
• Commercial Cold Storage: Stepped cylinder unloading for compressor power optimization under fluctuating ambient condenser loads.
• Industrial Process Freezing: Automated staging of multi-cylinder reciprocating compressors driven by UniSAB controllers in chemical and food-processing plants.
• Compressor Start-Up Unloading: Venting head pressure to decrease starting torque on electric compressor motors, protecting direct-on-line (DOL) and star-delta starters.

Frequently Asked Questions

How do I know if the Danfoss EVRF 032F3141 valve on my Sabroe SMC-108 has failed?

Common failure symptoms include erratic suction pressure, failure of the compressor to pull down temperature despite higher RPM, or excessive motor load caused by cylinders refusing to unload. Physically, if the coil is hot and humming but the cylinder head does not transition between loaded and unloaded states (measured by contact thermometers on the individual discharge head pipes), the internal pilot spool is either jammed with oxidized oil sludge or the armature return spring is fractured.

Can this solenoid valve be used on both Ammonia (R717) and Freon systems?

Yes. The Danfoss EVRF 032F3141 features high-grade steel and ductile cast iron construction with synthetic fluorocarbon/PTFE internal seals. It is completely inert to dry ammonia (anhydrous NH₃) as well as fluorinated halocarbon refrigerants (R22, R134a, R404A, R507) and standard refrigeration synthetic lubricants.

What is the pin configuration for the DIN 43650-A connector?

Terminal 1 is connected to Phase/Hot (or Positive + in DC variants), Terminal 2 is connected to Neutral (or Negative – in DC variants), and the central flat ground terminal is connected to Earth/Chassis Ground. Always verify that the included rubber gasket is seated properly between the connector housing and coil body to maintain IP65 ingress protection against engine room wash-downs and condensation.

Is the Danfoss 032F3141 supplied with the electrical coil?

Bare valve part number 032F3141 designates the hydraulic valve body and internal armature assembly. Solenoid coils (110V AC, 230V AC, or 24V DC) are typically supplied as modular clip-on or screw-fixed components depending on your specific vessel electrical plant parameters. Specify your control circuit voltage when ordering to receive the complete pre-assembled valve-and-coil unit.