Pressure Switch
Pressure Switch
We supply high-precision pressure switches by Yuken, Rexroth, TRAFAG. These components ensure reliable system control, accurate monitoring, and rugged durability for hydraulic and pneumatic applications.
With two decades as a trusted leader in refrigeration compressors and their critical components, ascompressors.com knows that safety and reliable operation are non-negotiable. Pressure switches are fundamental safety and control devices in any refrigeration or HVAC system, acting as critical sentinels that protect your valuable compressors from damaging high or low pressures, and manage system components efficiently. As your dedicated supplier, we offer a comprehensive range of high-quality pressure switches designed for the rigorous demands of commercial and industrial cooling applications.
A pressure switch is an electrical switch that operates by the action of fluid pressure. In refrigeration and HVAC, these switches are set to trip at specific pressure thresholds, opening or closing an electrical circuit. This action typically stops the compressor or activates/deactivates other components like condenser fans. Pressure switches are vital for preventing catastrophic failures, such as compressor burnout due to excessively high discharge pressure or damage from continuous operation under dangerously low suction pressure (e.g., due to a refrigerant leak).
Core Pressure Switch Types and Key Products:
Our extensive inventory includes a variety of pressure switches, carefully selected for their accuracy, durability, and unwavering reliability in demanding refrigeration environments. We focus on providing solutions that offer unparalleled safeguarding and robust performance:
High Pressure Cut-Out (HPCO) Switches: Installed on the discharge side of the compressor (high-pressure side), these switches protect the system from dangerously high pressures that can occur due to condenser fan failure, dirty coils, overcharge, or restricted flow. When the pressure exceeds a safe limit, the HPCO switch opens the compressor circuit, shutting it down to prevent damage. We offer both manual reset and auto reset types.
Low Pressure Cut-Out (LPCO) Switches: Installed on the suction side of the compressor (low-pressure side), these switches protect the compressor from operating under excessively low suction pressure, which can lead to overheating (due to lack of proper cooling from refrigerant flow) or liquid slugging. An LPCO typically shuts down the compressor when pressure drops below a safe threshold, indicating a leak or insufficient load. We offer both manual reset and auto reset types.
Dual Pressure Switches: A compact unit combining both high and low-pressure cut-out functions in a single device. This simplifies installation and wiring, providing comprehensive compressor protection from both ends of the pressure spectrum.
Oil Pressure Differential Switches: Crucial for compressors with forced lubrication systems. These switches monitor the difference between the compressor's oil pump discharge pressure and the crankcase pressure. If this differential drops below a safe level, indicating insufficient oil circulation, the switch will shut down the compressor, preventing bearing damage or other lubrication-related failures.
Fan Cycling Pressure Switches: Used to control condenser fan operation based on ambient temperature or head pressure. These switches activate or deactivate condenser fans to maintain optimal head pressure and improve system efficiency, especially in varying ambient conditions.
Adjustable vs. Fixed Setpoint Switches: We offer switches with field-adjustable pressure setpoints for versatility, as well as fixed-setpoint models for specific OEM applications requiring consistent performance.
We ensure our pressure switches feature robust construction, high-quality pressure-sensing elements (e.g., bellows, diaphragms), and reliable electrical contacts capable of handling the specified currents. They are designed for various refrigerants and come with common connection types (e.g., flare, solder, NPT).
Essential Applications and Industries for Our Pressure Switches:
The critical safety and control provided by our high-quality pressure switches are vital across a broad spectrum of commercial and industrial cooling applications:
Refrigeration Compressors: Serving as primary safety devices for hermetic, semi-hermetic, reciprocating, scroll, and screw compressors in all types of commercial and industrial refrigeration units.
HVAC Systems: Protecting compressors in central air conditioning units, chillers, and large air handling units from dangerous pressure conditions.
Condenser Fan Control: Managing condenser fan operation for optimal head pressure and energy efficiency.
Oil System Protection: Safeguarding lubricated compressors by monitoring critical oil pressure differentials.
Industrial Process Cooling: Ensuring safe and continuous operation of chilling systems in manufacturing plants, chemical industries, and food processing facilities.
Troubleshooting & Diagnostics: An invaluable aid for technicians to quickly diagnose system faults related to pressure issues.
Innovation, Reliability, and Unrivaled Expertise:
At ascompressors.com, our 20 years in the refrigeration field have taught us that reliable pressure control is the first line of defense against catastrophic system failure. A malfunctioning or incorrect pressure switch can lead to severe equipment damage and costly downtime. By choosing our high-quality pressure switches, you're investing in unparalleled system safety, extended equipment lifespan, reduced repair costs, and enhanced operational reliability for your entire refrigeration or HVAC system. Our technical team possesses the deep knowledge required to assist you in selecting the ideal pressure switch for your specific compressor, refrigerant, and application, ensuring optimal protection and seamless integration. Trust us to provide the crucial safeguards your cooling solutions demand.
Why Shop for Compressors at "A&S Aerodynamic"
Here at A&S Aerodynamic, we offer a wide range of refrigeration compressors from various brands and models. Our products are sourced from reputable brands in the industry, so you can be sure they’re made to fit OE specifications.
1. Before shipping, we will send you photos of the actual product for your confirmation ( eg. nameplate, appearance, and report).
2. The product comes with a 1-year manufacturer warranty policy and 3-year in-house warranty.
3. If the product is damaged during transportation or cannot be repaired due to non-human-caused within 1 year, no return, we will directly refund or resend the new product.
4. For select items, we will include a repair kit ( Special Needs Customer Service ).
5. Enjoy a worry-free experience throughout the entire process. Feel free to request quotes and place orders with confidence, we will provide 5-star service until you are satisfied.
6. Shipping and Taxes: See Quotation.
Need your compressors as soon as possible? Don’t worry; our warehouses are strategically located across the country to ensure fast, efficient shipping. Our primary strength lies in supply capability. Whether it's OEM manufacturing or global inventory searches—from components to complete units—we can match your needs with the nearest partner's inventory for rapid delivery. Our global alliance enables transactions at wholesale agency rates. Welcome aboard! Cheers!!
Pressure Switch Buyer's Guide
The Nameplate is Key: The model number alone is sometimes insufficient. We request a clear photo of the manufacturer’s metal nameplate. This confirms the specific Series, Voltage, and Bill of Material (BOM) number.
Refrigerant Verification: You must confirm the gas type (e.g., R134a, R404A, R290, or R410A). Using the wrong refrigerant in a Pressure Switch compressor designed for a different gas will lead to immediate failure and void the warranty.
Voltage & Frequency Check: Global power grids vary. Whether you need 115V/60Hz (USA), 220V/50Hz (Europe/Asia), or 3-Phase 380V, this must be explicitly confirmed during the inquiry stage to prevent electrical burnout.
Application Matching: We verify if your application requires LBP (Low Back Pressure for freezers), MBP (Medium), or HBP (High Back Pressure for A/C and chillers). Installing an LBP compressor in an HBP application will cause the motor to overheat.
Performance Benchmarking: Before shipment, units undergo rigorous testing for volumetric efficiency, motor amperage draw, and noise levels
The Test Report: For peace of mind, we can provide a Quality Inspection Report or a video of the Pressure Switch compressor under load test, proving it holds pressure and operates within factory specifications before it leaves our facility.
Spot Buy (Ready Stock): For urgent repairs, we leverage our global inventory of popular brands (Tecumseh, Copeland, Danfoss) to offer "2nd-Day Dispatch" on common Pressure Switch models.
Batch Production (OEM Orders): For distributors or appliance manufacturers requiring 50+ units, we schedule a production run. This typically requires a 2-4 week lead time but offers significant cost savings.
Condition Clarity: We clearly distinguish between "Factory New" (fresh production) and "New Surplus" (older stock). We allow you to choose based on your budget and warranty requirements.
Robust Crating: We do not use standard cardboard for international freight. All compressors are bolted to a pallet and sealed in fumigated wooden crates compliant with ISPM 15 standards for global entry.
Upright Transport: Compressors must remain upright to prevent oil from entering the compression chamber (which causes "liquid slugging"). Our packaging includes "This Side Up" shock sensors and indicators.
Customs & Documentation: We handle the complex paperwork, including Commercial Invoices and Certificates of Origin, ensuring your goods clear customs smoothly whether shipping via DHL Air Express or Sea Freight to any port in the world.
Request a Custom Quote
To get a customized quote, please provide the following information:
1. Machine Model
2. Item Parameters
3. Part Number
4. Photos
5. Quantity
6. Working Conditions
7. Any Other Requirements
Please email your complete request to us or Chat Online, and we will respond with a quote as soon as possible.