Oil Differential Pressure Control
Both automatic and manual reset models are available.
Description
The FSD series of differential pressure controls (oil pressure controls) protect refrigeration compressors and other machines. Refrigeration and lubrication systems both require a particular oil pressure in order to lubricate every component. If the pressure is too low, compressors will begin to stick (cylinder sticking) and lose oil during normal or start-up operations, and eventually ruin the bearing pad on the compressor.
The differential pressure switch receives the discharge pressure signal from the lubricating oil pump and suction pressure from the compressor. It maintains the two pressures within a specific range, and when the difference is lower than the set range, the switch automatically cuts the compressor circuit in order to stop operating.
Technical Data
Ambient temperature: -40 ~ 65℃
Medium temperature: -40 ~ 120℃
Available medium: R134a, R22, R407C, R404A/R507, water, air and oil.
Cable connection: The cable entry can be used for 15mm dia.
| Voltage (V) | A.C.110 | A.C.220 | |
| Current (A) | |||
| Non-inductive current | 24 | 16 | |
| Inductive current | Full load | 24 | 16 |
| Starting | 144 | 96 | |
| Symbol | Model | Adjust range | switch differential | Factory setting | Delay time (sec.) | Max. working pressure |
| (MPa) | (MPa) | (MPa) | (MPa) | |||
| FSD-C series | FSD15C | 0.03→0.15 | ≥0.05 | 0.05 | 1.7 | |
| FSD2C | 0.03→0.2 | ≥0.05 | 0.05 | 1.7 | ||
| FSD35C | 0.05→0.35 | ≥0.05 | 0.1 | NO | 1.7 | |
| FSD35CH | 0.05→0.5 | ≥0.05 | 0.1 | 3.3 | ||
| FSD-T series | FSD35T | 0.05→0.35 | ≥0.05 | 0.1 | 60 | 1.7 |
| FSD35TH | 0.05→0.5 | ≥0.06 | 0.1 | 60 | 3.3 | |
| FSD-CHM series | FSD1.5CHM | Fixed 0.15 | ≥0.04 | Fixed 0.15 | NO | 3.3 |
| FSD2.5CHM | Fixed 0.25 | ≥0.04 | Fixed 0.25 | 3.3 | ||
| Any special requirements should be marked behind the model number Inch connection size (7/16-20UNF), please state letter "E" after the model number. MGL stands for capillary, standard length is 1 m (including flare nuts), please mark the special length requirement. F stands for Internal thread connection A stands for Stainless steel air box assembly | ||||||
Standard Connection of Differential Pressure Control
Model name state "E" is connection 1/4'' Flare nut 7/16''-20UNF thread;
Without "E" is connection φ6 Flare nut M12*1.25 thread
OEM services are available on minimum order quantities of 500 units per model. For more information, please contact us.
