Membrane check valve LFDCV series

for oilhigh-temperaturefor HVAC

Product overview
Magnetic diaphragm (film‑coated) check valve LFDCV is designed for refrigeration units, commercial cabinets, small central air conditioners and related refrigeration equipment. It controls one‑way refrigerant flow at compressor discharge and suction sides in high‑temperature and high‑pressure segments. The internal guide design enables installation at any angle, and the integrated filter provides combined check and filtration functions.

Features

• Film‑coated magnetic diaphragm with flexible sealing for negligible reverse leakage.
• Minimal flow resistance and low pressure loss.
• Straight‑line compact design: small size, light weight, unrestricted installation angle.
• Integrated 40‑mesh filter in the valve body for particle protection.
• Compatible with fluorinated refrigerants and refrigeration oils.

Parameters (general)
Medium: Fluorinated refrigerants (e.g. R22, R134a, R410A) and oil.
Working temperature: -40℃ to +120℃.
Max working pressure: up to 5.5 MPa (model dependent, see model data).
Installation position: Any direction (flow direction indicated by arrow).

Models — dimensions, filter, pressures and capacities

• LFDCV-4 — OD: 1/4 in; D: 22 mm; L: 102 mm; Filter: 40 mesh; Max working pressure: 5500 kPa; Refrigeration capacity R404A: 6.8 kW.
• LFDCV-6 — OD: 3/8 in; D: 22 mm; L: 102 mm; Filter: 40 mesh; Max working pressure: 5500 kPa; Refrigeration capacity R404A: 14.2 kW.
• LFDCV-8 — OD: 1/2 in; D: 29 mm; L: 127 mm; Filter: 40 mesh; Max working pressure: 5200 kPa; Refrigeration capacity R404A: 38.2 kW.
• LFDCV-10 — OD: 5/8 in; D: 29 mm; L: 127 mm; Filter: 40 mesh; Max working pressure: 5200 kPa; Refrigeration capacity R404A: 42.6 kW.
• LFDCV-12 — OD: 3/4 in; D: 41 mm; L: 178 mm; Filter: 40 mesh; Max working pressure: 4100 kPa; Refrigeration capacity R404A: 79.7 kW.
• LFDCV-14 — OD: 7/8 in; D: 41 mm; L: 178 mm; Filter: 40 mesh; Max working pressure: 4100 kPa; Refrigeration capacity R404A: 108.5 kW.
• LFDCV-18 — OD: 1-1/8 in; D: 54 mm; L: 213 mm; Filter: 40 mesh; Max working pressure: 4000 kPa; Refrigeration capacity R404A: 188.5 kW.
• LFDCV-22 — OD: 1-3/8 in; D: 67 mm; L: 238 mm; Filter: 40 mesh; Max working pressure: 4000 kPa; Refrigeration capacity R404A: 232.8 kW.
• LFDCV-26 — OD: 1-5/8 in; D: 80 mm; L: 267 mm; Filter: 40 mesh; Max working pressure: 3000 kPa; Refrigeration capacity R404A: 397.7 kW.
• LFDCV-34 — OD: 2-1/8 in; D: 92 mm; L: 305 mm; Filter: 40 mesh; Max working pressure: 3000 kPa; Refrigeration capacity R404A: 691.1 kW.
• LFDCV-42 — OD: 2-5/8 in; D: 105 mm; L: 330 mm; Filter: 40 mesh; Max working pressure: 3000 kPa; Refrigeration capacity R404A: 927.3 kW.
• LFDCV-50 — OD: 3-1/8 in; D: 105 mm; L: 330 mm; Filter: 40 mesh; Max working pressure: 3000 kPa; Refrigeration capacity R404A: 1262.5 kW.

Technical specifications

• Design type: Magnetic diaphragm (film‑coated valve) with flexible sealing.
• Applicable media: Fluorinated refrigerants (R22, R134a, R410A) and oil.
• Operating temperature range: -40℃ to +120℃.
• Maximum working pressure: Up to 5.5 MPa depending on model; model‑specific values listed above in kPa.
• Installation: Any direction; flow direction indicated by arrow on valve body.
• Integrated filter: 40 mesh, combining check and filtration functions.
• Low flow resistance and negligible reverse leakage.
• Compact straight‑line construction for reduced footprint and weight.