Monday, February 09, 2009

240RA 200RB 100RB Solenoid Valves 电磁阀



240RA 9T 9M
Refrigeration solenoid valve.
MWP:500
MOPD: 300#
Fluid Temp: 250
Connections: ODF Extended
Style: Straight
Nominal liquid capacities:

R12 19.6 tons
R134a 23.6 tons
R22 30.5 tons
R407C 29.0 tons
R502 19.8 tons
R404a 21.0 tons
R410a Ask Wholesaler

Assembled in Mexico














Hot site: http://solenoids.9f.com/

Solenoid valves: Operation, selection, and application.
A full understanding of solenoid valves and some selection and installation tips will help to avoid trouble and provide an optimum application. [More]

Monday, February 02, 2009

One valve for ALL applications

The EX electrical control valve can be used in different control tasks.

  • expansion valve for superheat control
  • suction pressure control for capacity control
  • liquid injection for desuperheating of compressor
  • condensing pressure control
  • hot-gas bypass control to compensate excess compressor capacity and to ensure evaporating pressure does not go below a set point.

The ideal mounting position of control valves is with motor downward.

Wednesday, January 21, 2009

How to choose a reliable Alco Controls reseller?

1) The reseller should be an Alco Controls oriented store.
2) The reseller should have a reasonably good knowledge of their products that will answer your questions regarding size selections, installations, trouble-shooting and certainly help you make a wise purchase.
3) If you stick to a reseller that is really an Alco Controls oriented store, that is totally focusing on Alco, you have a better chance of ensuring what the sales staff are talking about. If a store specializes in 20-30 different things, how good are they in any one of those things? But you come into a store that specializes in 1-2 things, you have a better chance of getting the correct products for your job. Refrigeration applications are different. That’s why we focus on giving you the right components ~ selected for specific application. With us value isn't just how much you save, but how much more you receive!




Friday, January 16, 2009

Differential Pressure Controls Series


FD113 oil pressure safety control senses the effective oil pressure on pressure lubricate compressors. If inadequate oil pressure exists, a time delay is energized. If oil pressure does not recover to safe levels within the time delay setting, the compressor is shut down. The time delay allows the compressor adequate time to establish oil pressure on start up and avoids nuisance shutdowns on pressure drop of short duration during the run cycle.
FD113 uses the pressure differential between the 2 inputs to operate and electrical switch. For application in refrigeration and air-conditioning systems according to EN378. Compressor oil pressure control.
Maximum application flexibility is assured by providing an adjustable differential pressure switch which can be adjusted to the compressor's minimum required oil pressure needs and an adjustable electronic time delay which allows you to select the length of time the compressor runs below the minimum pressure before shutdown.
The minimum pressure setting and time delay values specified by the compressor manufacturer should be used when installing the FD113 control.




  1. Pressure range adjustable from 4 to 65 psid; timer start pressure - timer stop pressure is 3psid above timer start pressure.
  2. A SPDT switch is used in the pressure portion of the control which allows the addition of a 'safe-light' is desired.
  3. Electronic timer is time-adjustable from 20 to 150 seconds, supply voltage - 24 to 240Volt AC/DC; timing unaffected by voltage or ambient temperature variations.
  4. A SPDT manual reset switch is used in the timer module; upon time-out, the compressor is stopped and an alarm circuit is energized; to restart the compressor and de-energize the alarm circuit, the reset button is pushed.
  5. A factory installed jumper allowed the FD113 to be powered from a single source power; should separate circuits be desired for the timer and 'lockout' switch, the jumper can be removed.
  6. Agency approvals include: UL/CUL file number E85974, VDE0631/0660, Tuv, CE73/23/EWG, CE93/68/EWG.