Flow-control thermostatic valve LFTEV

expansionregulatingtemperature control

Product Overview
The thermal expansion valve is used to regulate the supply of liquid refrigerant in the evaporator. The supply is controlled by the superheat of the refrigerant so this valve is especially suitable for the supply of refrigerant liquid in the dry evaporator, because the superheat of the refrigerant at the outlet of the dry evaporator is proportional to the load of the evaporator.

Parameters
General | Value
Applicable Medium: All common HCFC and HFC refrigerants
Temperature range: -40℃~+60℃
Evaporation temperature range: -40℃~+10℃
Max working pressure: 46bar
Equalization size: 1/4" ODF, 6mm ODF
Installation position: The top of the valve is facing upwards, and the fluid flows in the direction of the inlet and outlet

Features

• Large evaporation temperature range.
• Interchangeable flow port components for easy inventory, pairing, and maintenance.
• The installation of the thermometer bulb is convenient, and there is good heat transfer effect between the pipeline and the thermometer bulb.
• The valve core and valve body are made of wear-resistant alloy, with a long service life.
• Superheat regulation, performance stable.

Specifications and Dimensions
Refrigerant | Model | Balance type | Capillary (m) | Inlet (inch / mm) | Outlet (inch / mm) | Equalization (inch / mm)
R22 | LFTX2 (inner) | inner | 1.5 | 3/8 / 10 | 1/2 / 12 | —
R22 | LFTEX2 (outer) | outer | 1.5 | 3/8 / 10 | 1/2 / 12 | 1/4 / 6
R407C | LFTZ2 (inner) | inner | 1.5 | 3/8 / 10 | 1/2 / 12 | —
R407C | LFTEZ2 (outer) | outer | 1.5 | 3/8 / 10 | 1/2 / 12 | 1/4 / 6
R134a | LFTN2 (inner) | inner | 1.5 | 3/8 / 10 | 1/2 / 12 | —
R134a | LFTEN2 (outer) | outer | 1.5 | 3/8 / 10 | 1/2 / 12 | 1/4 / 6
R404A / R507 | LFTS2 (inner) | inner | 1.5 | 3/8 / 10 | 1/2 / 12 | —
R404A / R507 | LFTES2 (outer) | outer | 1.5 | 3/8 / 10 | 1/2 / 12 | 1/4 / 6

Selection Table of Flow Port Components (Nominal Refrigerating Capacity at -40℃~+10℃)
Option | Nominal Refrigerating Capacity (RT) R22 / R407C / R134a / R404A-R507 | Nominal Refrigerating Capacity (KW) R22 / R407C / R134a / R404A-R507
0X | 0.15 / 0.16 / 0.11 / 0.11 | 0.11 / 0.5 / 0.5 / 0.4 / 0.38
00 | 0.3 / 0.3 / 0.25 / 0.21 | 1.0 / 1.1 / 0.9 / 0.7
01 | 0.7 / 0.6 / 0.5 / 0.45 | 2.5 / 2.7 / 1.8 / 1.6
02 | 1.0 / 1.1 / 0.8 / 0.6 | 2.5 / 3.8 / 2.6 / 2.1
03 | 1.5 / 1.6 / 1.3 / 1.2 | 5.2 / 5.6 / 4.8 / 4.2
04 | 2.3 / 2.5 / 1.9 / 1.7 | 8.0 / 8.6 / 6.7 / 6.0
05 | 3.0 / 3.2 / 2.5 / 2.2 | 10.5 / 11.3 / 8.6 / 7.7
06 | 4.5 / 4.9 / 3.0 / 2.6 | 15.5 / 16.7 / 10.5 / 9.1

Dimension
Dimension drawing and dimension image available for LFTEV series.

Documents & Drawings
PDF available: "Thermostatic Expansion Valves LFTEV" (document date shown on-site: 2026-03-02).

Caractéristiques / spécifications techniques

• Series: LFTEV thermostatic expansion valves.
• Applicable refrigerants: All common HCFC and HFC refrigerants.
• Operating ambient temperature range: -40℃ to +60℃.
• Evaporation temperature range: -40℃ to +10℃.
• Maximum working pressure: 46 bar.
• Equalization line size options: 1/4" ODF or 6 mm ODF (depending on model).
• Capillary length standard: 1.5 m (varies by model).
• Connection inlet/outlet common sizes: 3/8" (10 mm) inlet, 1/2" (12 mm) outlet for main models; some outer models include 1/4" (6 mm) equalization.
• Balance types: inner and outer (available per refrigerant/model).
• Materials: valve core and body made of wear-resistant alloy for extended life.
• Function: superheat-based refrigerant flow control suitable for dry evaporators.