--- product_id: 94267809 title: "Control Devices NC Series Brass Non-Code Safety Valve, 25-200 psi Adjustable Pressure Range, 1/4\" Male NPT" brand: "control devices" price: "NT$456" currency: TWD in_stock: true reviews_count: 8 category: "Industrial" url: https://www.desertcart.tw/products/94267809-control-devices-nc-series-brass-non-code-safety-valve-25 store_origin: TW region: Taiwan --- # Control Devices NC Series Brass Non-Code Safety Valve, 25-200 psi Adjustable Pressure Range, 1/4" Male NPT **Brand:** control devices **Price:** NT$456 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** Control Devices NC Series Brass Non-Code Safety Valve, 25-200 psi Adjustable Pressure Range, 1/4" Male NPT by control devices - **How much does it cost?** NT$456 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/94267809-control-devices-nc-series-brass-non-code-safety-valve-25) ## Best For - control devices enthusiasts ## Why This Product - Trusted control devices brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Size:1/4" This Control Devices NC25-1UK002 safety valve has a brass body, an adjustable relief pressure, a 1/4" male NPT threaded inlet connection, a silicon O-ring, and a stainless steel pull ring for manual pressure relief. The valve's brass body, brass valve seat, and the stainless steel spring and ball resist corrosion and can be used in operating temperatures up to 250 degrees F. The valve can be adjusted to open between 25 and 200 psi using the knurled adjustment screw and locking jam nut. This safety valve has an 80 standard cubic feet per minute (SCFM) flow rate and is suitable for high temperature pressure relief applications such as in air compressors.Relief valves remove excess pressure or vacuum from a system. The valve openings allow fluids or gases to escape to decrease pressure, and then close once the valve reaches the reseating pressure limit. They also relieve excess vacuum by opening to release a gas into the system and then closing after it reaches its low-pressure limit. Some relief valves have an adjustment mechanism to set the pressure where the valve opens, making it suitable for various applications. Relief valves are rated according to the volume of liquid or gas that can flow through them and the material that the valve is constructed from must be suitable for the fluid or gas, which may be corrosive or at an extreme temperature, in which it operates. Relief valves are used in a variety of applications, such as air compressors, petrochemical and chemical manufacturing, natural gas processing, and power generation.Control Devices manufactures valves and other flow control devices. The company, founded in 1963, is headquartered in Fenton, MO. ## Features - Relief pressure adjustable from 25 to 200 psi - 1/4" male NPT threaded inlet connection - Brass construction and stainless steel spring for corrosion resistance - 250 degrees F maximum temperature for use in high temperature applications - Silicon O-ring provides leak-proof seal to within 10 percent of set pressure ## Images ![Control Devices NC Series Brass Non-Code Safety Valve, 25-200 psi Adjustable Pressure Range, 1/4" Male NPT - Image 1](https://images-na.ssl-images-amazon.com/images/I/41mI6HudWLL.jpg) ![Control Devices NC Series Brass Non-Code Safety Valve, 25-200 psi Adjustable Pressure Range, 1/4" Male NPT - Image 2](https://images-na.ssl-images-amazon.com/images/I/41dSseoTEVL.jpg) ![Control Devices NC Series Brass Non-Code Safety Valve, 25-200 psi Adjustable Pressure Range, 1/4" Male NPT - Image 3](https://images-na.ssl-images-amazon.com/images/I/41995KvTb5L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐ Ajustable Pressure Relief Valve Review *by E***0 on January 8, 2014* This little PRESSURE RELIEF VALVE was ordered for an RO pressurized system as an extra safety backup in case the water pump pressure switch would fail and the pump would continue building unsafe pressure to the system to the point it would damage the system.There were absolutely no written Instruction in the package from the manufacture!I was lucky enough to have found a reviewer who actually mentioned what the water pressure range each springs represent below:manufacturer instructions:Yellow from 25-50Red from 51-100Silver from 101-150Blue from 151-200I ended up using the red spring, because It' s between the safe range of my water pressure system. The safe range that I needed is beyond 85 PSI for the relief valve to open and release the pressure until It safely got back to 80 PSI once again. To adjust the relief valve:1) There are two nuts on top of it. First among the springs, decide which is the safe range your system should safely operate under.2) Totally unscrew the top and put in the correct color spring intended to be used according to your system3) For instance, I have used the Red Spring. Tightening down the top nut to increase the cut-in range between 51 PSI-100 PSI to where the relief valve will open. I was able to test it on my system until I was able to narrow it down to 85PSI where It would safely open up and release the pressure back to just 80 PSI.I took one star off, because there were no Instruction at all for the little thing! ### ⭐⭐⭐⭐⭐ "Calibrated" easily using the gauge on the compressor *by P***O on March 25, 2016* No issues here! Package included instructions making it clear which spring to use for my application, which is a tankless on-board air compressor in my truck. I installed it between my compressor and quick-release (via T adapter) so that if I inadvertently disconnect the hose from the tire, the hose doesn't burst or damage the compressor. "Calibrated" easily using the gauge on the compressor, and was easy to adjust.I only used the red 51-100 PSI spring, set it to 80 PSI. It popped consistently. It does make a decent amount of noise when it opens (probably sounds like a gunshot to strangers)...I was hoping it'd be more subtle...but it works. ### ⭐⭐⭐⭐⭐ This worked great for me and I plan to buy more in ... *by L***. on January 30, 2016* This worked great for me and I plan to buy more in the future.I bought it to use with a small diaphragm pump which only puts out 5 psi max. Rather than use the supplied springs, I went to Ace hardware and bought a small fine-wired spring (the lightest spring I could find) and cut it to fit the length of the brass housing. With a bit of experimenting and adjusting the setting of the tension, I got it to open at 3 to 4 psi. My point is that this can be used at any psi with the correct spring pressure to control the valve opening. --- ## 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.tw/products/94267809-control-devices-nc-series-brass-non-code-safety-valve-25](https://www.desertcart.tw/products/94267809-control-devices-nc-series-brass-non-code-safety-valve-25) --- *Product available on Desertcart Taiwan* *Store origin: TW* *Last updated: 2026-04-23*