Pilot-operated valve LFDBV

regulatingflow-controlfor refrigeration

Product Overview
LFDBV discharge-bypass valve is a load-adjust component for refrigeration systems with a nonadjustable compressor. It operates as an automatic expansion valve to maintain a fixed evaporation pressure and to preserve minimum evaporating pressure. The valve automatically varies its opening to stabilize outlet pressure despite inlet pressure changes within a defined range. ODF connections. Maximum working pressure: 28 bar.

Dimensions and Weights
Model | Valve size | Connections (Inlet (A) / Outlet (B)) | Dimensions (mm) C | D | E | F
LFDBV | 0.5 / 1.0 / 2.0 / 3.0 / 4.0 | 6 mm ODF / 10 mm ODF or 1/4" ODF / 3/8" ODF | C: 58 | D: 36 | E: 106 | F: 54
LFDBV | 5.0 / 6.0 | 10 mm ODF / 16 mm ODF or 3/8" ODF / 5/8" ODF | C: 64 | D: 47 | E: 122 | F: 69

Capacities (nominal capacity, kW)
Valve size | Orifice size | R134a | R22 | R404A | R507
0.5 | 0.7 | 0.98 | 1.4 | 1.0 | 1.0
1.0 | 1.0 | 1.4 | 2.1 | 1.5 | 1.5
2.0 | 2.0 | 2.9 | 4.2 | 3.0 | 3.0
3.0 | 3.0 | 6.7 | 9.8 | 6.8 | 6.9
4.0 | 3.5 | 8.9 | 12.8 | 9.0 | 9.0
5.0 | 4.75 | 16.3 | 23.6 | 16.5 | 16.6
6.0 | 5.0 | 20.4 | 30.6 | 21.4 | 21.6

Additional Notes
Functions as an automatic expansion/bypass valve for refrigeration; maintains fixed evaporation pressure and minimum evaporating pressure; automatically adjusts opening to stabilize outlet pressure; ODF connections; maximum working pressure 28 bar. Datasheet available (PDF).

Technical features / specifications

• Model: LFDBV
• Type: Discharge-bypass valve / automatic expansion valve (for systems with nonadjustable compressor)
• Function: Maintain fixed evaporation pressure and minimum evaporating pressure; automatic opening adjustment to maintain constant outlet pressure
• Maximum working pressure: 28 bar
• Connection types: ODF connections — 6 mm, 10 mm, 16 mm; 1/4", 3/8", 5/8" ODF options
• Valve sizes available: 0.5, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0
• Orifice sizes (corresponding): 0.7, 1.0, 2.0, 3.0, 3.5, 4.75, 5.0
• Dimensions example (mm): C: 58 or 64; D: 36 or 47; E: 106 or 122; F: 54 or 69 (depending on valve size)
• Nominal capacities (kW) for refrigerants: R134a, R22, R404A, R507 — see capacities table above