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Thermal Automatic Expansion Valve
Application
Thermal automatic expansion valves in the series of 221X, 22X, and 223X in this chapter are designed to be attached with orifice available for replacing to select capacity flexibly and they could be used in various sectors as follows.
- Refrigerating System(Showcase in supermarket, refrigerator, ice cream machine & ice maker, and reefer container.
- Air-conditioning System
- Heat Pump System
- Liquid Cooler

The refrigerants available are
- HCFC(R22), HFC(R134a), R404A, R407C or R507).
These belong to Group 2 according to the definition of Chapter 1(b), Article 13 of Directive 2014/68/EU with regard to EC Regulation No. 1272/2008. .
Operation
Thermal automatic expansion valve controls flux of liquid refrigerant in evaporator. Super heat degree of refrigerant controls injection of liquid. Thermal automatic expansion valve is like a controller between high and low compression of refrigerating system, makes refrigerant flux to evaporator and evaporation rate of liquid refrigerant in evaporator matched.
If the actual super heat degree is bigger than the set value, the valve supplies more liquid refrigerator.
If the actual super heat degree is smaller than the set value, the valve reduces flux of liquid refrigerant to evaporator.
And then, the evaporator could be completely utilized and liquid refrigerant cannot reach compressor.


Solenoid Valve
Application
Solenoid valve is designed to be installed on commercial refrigerating systems and private industrial air-conditioning devices using the following refrigerants
- HCFC(R22)
- HFC(R134a, R404A, R407C, R410A, R507)
- HFO, HFO/HFC Mixture(R1234ze, R448A, R449A, R450A and R452A)
These belong to Group 2 according to the definition of Chapter 1(b), Article 13 of Directive 2014/68/EU with regard to EC Regulation No. 1272/2008. In addition, solenoid valves identical to DN25(Models 1078*9, 1098/9, 1079/11 and 1099/11) could be installed on the systems using the following refrigerants.

- HCFC(R32)
- HFO(R1234yf)
These are classified into A2L in the Standard ASHIRAE 34-2013 and belong to Group 1 according to the definition of Chapter 1(a), Article 13 of Directive 2014/68/EU with regard to EC Regulation No. 1272/2008.
In case of a refrigerant with specific purpose which is not mentioned as above, please inquire of the technical team of CASTEL.
Application
The coil in this chapter is normally closed type. That is, when power is not supplied to coil, plunger closes the path for fluid.
If power is supplied to coil, plunger opens valve seat to connect inlet and outlet.
All the valves as above are sold as the version without coil(with suffix S), and coil series 9300 version, type HF-2 “FAST LOCK” (In case of coil 9300/RA6-220/230 VAC, suffix A6, and in case of coil 9300/RA7-240 VAC, suffix A7, respectively). .
Valve series 1020 and 2028 are direct operating ones. The operation of valve depends on magnetic field created by current in coil.
Opening and closing of main valve seat, which is an only one, is directly controlled by portable plunger. This valve can be operated in case of zero pressure differentiation. .


Liquid-level Meter

Application
Liquid indicator and moisture/liquid indicator can test such as normal flow of refrigerant fluid, existence of moisture, etc. in liquid circuit quickly and safely.
They are designed to be installed in commercial refrigerating systems and private industrial air-conditioning devices using the following refrigerants.
- HCFC(R22)
- HFC(R134a, R404A, R407C, R410A, R507)
- HFO, and HFO/HFC Mixture(R1234ze, R448A, R449A, R450A and R452A)
These belong to Group 2 according to the definition of Chapter 1(b), Article 13 of Directive 2014/68/EU with regard to EC Regulation No. 1272/2008.
In addition, the indicators in series 3840 and 3940 could be installed in the system using the following refrigerants.

- HFC(R32) and HFO(R1234yf) classified into A2L in the Standard ASHRAE 34-2013
- HC(R290 R600 or R600a) classified into A3 in the Standard ASHRAE 34-2013
Group 1 according to the definition of Chapter 1(a), Article 13 of Directive 2014/68/EU with regard to EC Regulation No. 1272/2008.
In case of a refrigerant with specific purpose which is not mentioned as above, please inquire of the technical team of CASTEL.
Notes: Indicator series 3680, 3780, and 3781 are piping components and excluded from the application scope of Directive 2014/68/EU
Operation
Moisture liquid indicator consists of ring detection device which the color changes from green to yellow depending on moisture rate in the system.
The moisture amount standing for “Green” could be considered as permissible to operate properly the system. If detection device becomes “light green” yellow, it means reaching threshold, making operation condition difficult.
If detection device becomes “yellow”, it is time to replace filter drier. If filling and operating conditions of device is normal, refrigerant looks perfectly liquid under the “lens” of the indicator. Foam means partial evaporation of refrigerant fluid along liquid line. .


Closed Filter Drier

Application
The filter in this chapter is designed to be installed in commercial refrigerating systems and private industrial air-conditioning devices.
The filter series DF2, DS3 and DF3 are especially developed to the refrigerating system using HFC refrigerants, in particular, R134a, R404A, R407C, R410A and R507 mixed with POE lubricant. Nevertheless, new product block can be successfully used in the refrigerating systems using the existing CFC or HCFC refrigerants mixed with mineral lubricant. .
Composition
Filter is completely made of steel with chrome-plated flare screw connection.
The product includes copper-pipe welded connection, and it is available for soldering copper-pipe on ODS .
Molecular sieves-activating alumina mixture is selected for block to keep very excellent dehydrating characteristics and to offer very high acid-adsorbing capacity.
Filter series DS3 and DF3 blocks are molded with proper mixture consisting completely of 3A molecular sieves dehydrating filling and special assembly.
By selecting 3A molecular sieves as an only dehydrating material, the block keeps very excellent deoxygenating characteristic and have optimal moisture-adsorbing capacity.
Manufacturing process offers considerable compression and robustness to both the products, making them impact-and-abrasion-proof.
The shape of block is designed to offer area for the incoming fluid as much as possible. Internal cavity is also arranged to have consistent wall thickness.
As a result, fluid has constant strength from every point, flows linearly through block and is guaranteed with effective dehydration and minimal filling loss.
As a result, fluid has constant strength from every point, flows linearly through block and is guaranteed with effective dehydration and minimal filling loss.
Block is chemically deactivated and not soluble with no reaction to refrigerant, blocking oil by-products flowing into the circuit.