Flow controls and valves by Alco Controls

Engineering selection and calculation of Alco Controls valves and protective components engineered for refrigeration systems, process chillers, and HVAC heat pumps.

Thermo-expansion valves by Alco Controls covering TI and T series

Precision thermal expansion valves from Alco Controls across TI, TIH, and T lines control refrigerant flow into evaporators while securing constant superheat. Interchangeable orifice cages and balanced port construction deliver stable operation under shifting condensing pressure heads.

Interchangeable orifice assemblies enabling precise tuning of system cooling throughput
Forged brass valve body with solder or threaded ports matching standard tubing diameters
Stable superheat regulation preventing liquid refrigerant flooding back toward compressor
Full suitability for R404A, R134a, R407C, R410A, R32, and subcritical refrigeration blends

Electronic control valves by Alco Controls across EX4 to EX8 series

Stepper motor driven electronic expansion valves from Alco Controls spanning EX4, EX5, EX6, EX7, and EX8 series provide continuous throttling modulation in chillers and precision HVAC units. Ceramic slide disks yield linear flow characteristics and hermetic shutoff when de-energized.

High-resolution stepper motor actuator delivering rapid linear valve stem positioning
Wear-resistant ceramic valve plates ensuring long operating life and tight fluid shutoff
Bidirectional capability supporting reversible heat pump circuits without extra piping
Precision management of superheat, condensing head pressure, and liquid subcooler feeds

Adjustable pressure switches and safety cutouts by Alco Controls

Safety and operational pressure controls from Alco Controls across CS1, PS1, and PS2 lines safeguard refrigeration units against low suction levels or excessive discharge pressure. The CS1 design is optimized for elevated pressure thresholds found in subcritical CO2 fluid circuits.

Heavy-duty single-pole double-throw snap-action contact mechanism with high rating
Separate adjustment screws for primary setpoint threshold and switching differential
Available with automatic reset action or manual mechanical reset lockout for security
Reinforced stainless steel bellows sensing element built for synthetic fluids and CO2

Electronic oil management systems by Alco Controls TraxOil series

Electro-optical oil level regulators from Alco Controls TraxOil series continuously inspect lubricant volume inside compressor sumps across scroll, reciprocating, and screw machines. When levels drop, an integrated solenoid injects oil, eliminating bearing friction wear.

Infrared optical sensor design immune to oil foaming and transient splash bubbles
Integral solenoid valve delivering metered lubricant injection straight into sump
Dry relay contacts enabling safe compressor shutdown during critical oil shortages
Three-color diagnostic status indicator displaying fill sequence and system alerts

System protectors and moisture indicators by Alco Controls

Hermetic filter driers from Alco Controls ADK series together with BTAS cleanable housings extract solid debris, dissolved moisture, and acid residues from refrigeration lines. MIA sight glasses provide visible proof of full liquid flow and indicate system dryness through color shifts.

Composite solid core blending molecular sieve beads with activated aluminum oxide
High moisture and acid holding capacity protecting compressor motor insulation
Corrosion-resistant epoxy powder coating applied to solid steel filter vessel
High-sensitivity moisture indicator crystal showing clear visual color changes

Solenoid shutoff valves by Alco Controls covering 110RB and 200RB lines

Electromagnetic valves from Alco Controls including direct-acting 110RB and pilot-operated 200RB and 240RA families isolate liquid pipelines, hot gas defrost lines, and bypass loops. The valves pair with interchangeable molded coils across alternating and direct current supplies.

Forged brass valve body with extended copper connections allowing braze assembly
Interchangeable molded solenoid coils rated IP65 across 24V, 110V, and 230V feeds
Bubble-tight internal closure offering low flow restriction throughout open cycles
Synthetic elastomer diaphragm compounds compatible with polyolester lubricants

Thermo-expansion valve operational principles in refrigeration loops

Thermal expansion valves from Alco Controls across TI and T series deliver continuous refrigerant throttling into evaporator assemblies across cooling chillers and commercial air handlers.

Balanced port geometry keeps superheat steady regardless of ambient condensing head variations throughout summer and winter seasons.

Interchangeable orifice cages allow technicians to reconfigure fluid flow capacity during plant upgrades or when retrofitting equipment to new eco-friendly working fluids. The valves eliminate liquid slugging back into compressor sumps during rapid cooling load transitions.

Precision electronic flow throttling via EX series stepper valves

Electronic control valves from Alco Controls spanning EX4, EX5, EX6, EX7, and EX8 lines provide direct stepper actuation for tight mass flow management.

Combining high-resolution step motors with ceramic sliding plates produces a linear throttling response from one percent opening up to full capacity. Swift stem travel allows the external digital controller to counter sudden heat spikes in data center cooling units and process chillers.

Full bidirectional fluid flow eliminates bypass check valves inside heat pump reversing circuits, streamlining overall piping complexity.

Safety pressure cutouts and switches for subcritical CO2 circuits

Safety pressure controls from Alco Controls CS1 series address elevated mechanical demands in high-pressure refrigeration systems, including subcritical carbon dioxide R744 machinery.

Robust stainless steel bellows withstand cyclic pressure pulsations and hydraulic shocks generated by reciprocating compressors. Independent adjustment screws for primary setpoint cut-in and reset differential ensure adherence to plant safety envelopes.

Single-pole double-throw snap-action contact blocks provide positive electrical interruption without contact welding or arcing.

Optical oil level monitoring and equalization with TraxOil modules

Electronic oil level regulators from Alco Controls TraxOil OM3, OM4, and OM5 lines safeguard multiple compressor racks and industrial chillers from oil starvation.

The integrated infrared optical sensor identifies the true liquid lubricant boundary while filtering out froth bubbles and turbulent fluid movement during startup. When oil drops below the set threshold, an internal timer triggers a built-in solenoid for metered sump replenishment.

If proper lubricant volume is not restored within the allowed timeframe, a dry contact relay shuts down the compressor safely.

Deep fluid dehydration with ADK filter driers and moisture indicators

Internal refrigeration circuit protection against particulate debris and moisture is maintained through Alco Controls ADK solid-core filter driers and cleanable BTAS vessels.

The solid core combines molecular sieve beads with activated aluminum oxide to absorb dissolved water, trap breakdown residues, and neutralize acidic compounds formed under high operating temperatures.

MIA moisture indicators feature a viewing port with a sensitive indicator crystal that changes color according to relative moisture content, enabling timely maintenance without opening piping.

Solenoid shutoff valves for fluid line isolation and defrost loops

Electromagnetic valves from Alco Controls including direct-acting 110RB and pilot-operated 200RB and 240RA designs deliver tight fluid shutoff across refrigeration pipelines.

Forged brass bodies and extended copper connection stubs permit direct torch brazing without disassembling valve bodies or risking damage to inner synthetic seals. Standardized IP65 molded coils resist water condensation and industrial vibration.

Streamlined internal flow paths minimize hydraulic pressure loss, bolstering total thermodynamic efficiency throughout continuous chilling cycles.

Alco Controls and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Alco Controls and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.