--- product_id: 621339 title: "NEW Gas Air Compressor unloader valve pilot check valve combination 140-175 by conrader" brand: "conrader" price: "€ 104.98" currency: EUR in_stock: true reviews_count: 8 category: "Conrader" url: https://www.desertcart.pt/products/621339-new-gas-air-compressor-unloader-valve-pilot-check-valve-combination store_origin: PT region: Portugal --- # 1/2" NPT brass threaded connection -65°F to 400°F operating temp 30 CFM flow rate NEW Gas Air Compressor unloader valve pilot check valve combination 140-175 by conrader **Brand:** conrader **Price:** € 104.98 **Availability:** ✅ In Stock ## Summary > ⚙️ Master your compressor’s pulse with Conrader’s all-in-one valve combo! ## Quick Answers - **What is this?** NEW Gas Air Compressor unloader valve pilot check valve combination 140-175 by conrader by conrader - **How much does it cost?** € 104.98 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/621339-new-gas-air-compressor-unloader-valve-pilot-check-valve-combination) ## Best For - conrader enthusiasts ## Why This Product - Trusted conrader brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Endure:** Durable all-brass construction engineered for rugged outdoor use - • **Optimized Airflow:** 30 CFM flow rate ensures efficient pressure management - • **Plug & Play Compatibility:** Designed to integrate smoothly with throttle control mechanisms (not included) - • **Adjustable Pressure Settings:** Factory pre-set PSI with easy pilot valve tuning for custom performance - • **All-in-One Precision Control:** Combines pilot, check & unloader valves for seamless compressor operation ## Overview The Conrader Gas Air Compressor Unloader Valve Pilot Check Valve Combination is a robust, all-brass valve unit designed for gas or electric air compressors. Featuring a 30 CFM flow rate and adjustable pressure settings, it efficiently manages compressor pressure cycles by combining pilot, check, and unloader valves in one compact device. Built to withstand extreme temperatures from -65°F to 400°F, it ensures reliable outdoor performance and easy integration with throttle controls. ## Description The Gas unloader acts like the brains of the air compressor, combining a Check valve, Pilot Valve and Unloader Valve all in one. Conrader Piloted Unloader Check valves are an all-in-one combination valve to run an air compressor for continuous operation. The valve includes a pilot valve, discharge unloader valve, and check valve. This can be used on gas engine or electric motor driven air compressors. In operation, the check valve prevents back flow as the compressor builds pressure. The pilot remains closed until the downstream pressure reaches the unload setting. The pilot then opens and pressurizes the unloader valve. This causes the unloader valve to open and vent the excess air from the compressor to the atmosphere. As the compressed air downstream is used and the pressure drops to the load setting the pilot closes and depressurizes the unloader valve. The unloader valve then closes and the pressure begins to build again and repeats the cycle. Review: Excellent - Just the one i needed. Worked and is working wonderfully. Review: Great fit for air compressor - Just what I needed to get my gas powered air compressor. I been using my air compressor quite a lot since my battery powered impacts have broken. I replaced my broken valve with this one and it has been working great ## Features - __ PLEASE NOTE: 1/2" NPT MEASURES 0.850" OUTSIDE THREAD DIAMETER IN INCHES. - ALL BRASS CONSTRUCTION AND BUILT FOR THE RIGORS OF OUTDOOR GAS COMPRESSORS. - 30 CFM FLOW RATE, PSI'S ARE PRE-SET FROM THE FACTORY AND CAN BE ADJUSTED ON THE PILOT VALVE. - PRESSURE DIFFERENTIAL 10 TO 50 PSI, OPERATING TEMP -65f TO 400f MAX. MUFFLER INCLUDED. - THIS UNIT IS DESIGNED TO WORK IN CONGRUENCE WITH A THROTTLE CONTROL MECHANISM (NOT INCLUDED) THAT CONNECTS FROM THE SIDE THROTTLE CONTROL PORT ON THIS VALVE TO THE THROTTLE ARM ON YOUR ENGINE. ## Technical Specifications | Specification | Value | |---------------|-------| | Best Sellers Rank | #159,908 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #527 in Air-Compressor Accessories | | Brand | conrader | | Customer Reviews | 4.7 out of 5 stars 110 Reviews | | Exterior Finish | Brass | | Inlet Connection Size | 0.5 Inches | | Inlet Connection Type | National Pipe Tapered | | Item dimensions L x W x H | 4 x 4 x 2 inches | | Material | Brass | ## Images ![NEW Gas Air Compressor unloader valve pilot check valve combination 140-175 by conrader - Image 1](https://m.media-amazon.com/images/I/41tuoMn3S6L.jpg) ## Questions & Answers **Q: is this product compatible with harbor freight central pneu #69783 9gal 212cc 135psi wheel barrow compressor** A: You'll need to turn the pressure down pretty low as it's is factory set to 175psi. As long as the cable is long enough it should be fine. **Q: Is there an outlet for a regulator and pressure switch** A: yes. you would have to add a tee fitting to install a regulator or pressure switch. this is an unloader valve. it regulates to the max psi your compressor will put out. **Q: Is the cut in and cut out adjustable. I need one max 150 psi** A: yes! **Q: I'm building a custom compressor that will be electric. Will I be able to use this unloader on an electric compressor?** A: Wouldn't you want one to shut you electric motor off? This will not do that,you need a electric cut off switch,this would work just to unload compressor but not shut motor off ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent *by I***. on October 8, 2024* Just the one i needed. Worked and is working wonderfully. ### ⭐⭐⭐⭐⭐ Great fit for air compressor *by S***L on November 2, 2025* Just what I needed to get my gas powered air compressor. I been using my air compressor quite a lot since my battery powered impacts have broken. I replaced my broken valve with this one and it has been working great ### ⭐⭐⭐⭐⭐ Not Bad *by M***Y on November 26, 2025* Works great --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/621339-new-gas-air-compressor-unloader-valve-pilot-check-valve-combination](https://www.desertcart.pt/products/621339-new-gas-air-compressor-unloader-valve-pilot-check-valve-combination) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-04-23*