--- product_id: 646866433 title: "bmotiontech over pressure relief valve keeps vacuum chamber below excessive positive pressure < 1.5psig, improved version, One-piece valve body, minimized potential leak (KF25 flange)" brand: "brownian motion technology" price: "Β£62.74" currency: GBP in_stock: true category: "Brownian Motion Technology" url: https://www.desertcart.co.uk/products/646866433-bmotiontech-over-pressure-relief-valve-keeps-vacuum-chamber-below-excessive store_origin: GB region: United Kingdom --- # One-piece stainless steel valve body Pressure relief at precise 1.5 psig threshold Minimized leak risk with KF25 flange seal bmotiontech over pressure relief valve keeps vacuum chamber below excessive positive pressure < 1.5psig, improved version, One-piece valve body, minimized potential leak (KF25 flange) **Brand:** brownian motion technology **Price:** Β£62.74 **Availability:** βœ… In Stock ## Summary > πŸ› οΈ Keep your vacuum chamber safe and sound β€” pressure relief perfected. ## Quick Answers - **What is this?** bmotiontech over pressure relief valve keeps vacuum chamber below excessive positive pressure < 1.5psig, improved version, One-piece valve body, minimized potential leak (KF25 flange) by brownian motion technology - **How much does it cost?** Β£62.74 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/646866433-bmotiontech-over-pressure-relief-valve-keeps-vacuum-chamber-below-excessive) ## Best For - brownian motion technology enthusiasts ## Why This Product - Trusted brownian motion technology brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Precision Pressure Control:** Automatically opens at 1.5 psig to protect your vacuum system from damage. - β€’ **Compact & Lightweight Design:** At just 4.2 ounces, it fits effortlessly into your setup without bulk. - β€’ **Robust Stainless Steel Build:** Single-piece valve body ensures durability and virtually zero leak potential. - β€’ **Spring-Loaded Safety Mechanism:** Reliable piston action prevents overpressure and safeguards sensitive components. - β€’ **Seamless KF25 Flange Integration:** ISO-standard flange guarantees secure, hassle-free installation. ## Overview The bmotiontech over pressure relief valve is a precision-engineered, one-piece stainless steel valve designed to maintain vacuum chamber pressure below 1.5 psig. Featuring a spring-loaded piston that opens automatically at the set threshold, it prevents overpressure damage to pumps and viewports. Its ISO-KF25 flange ensures a secure, leak-minimized fit, making it an essential upgrade for professionals demanding reliable vacuum system protection. ## Description πŸ’₯ Prevent excessive positive pressure build-up in pumps or vacuum chambers 🚿 Spring loaded piston pushed open when chamber pressure > 1.5 psig or 16.2 psia or 1116 mbarπŸ”’ Spring loaded piston close when chamber pressure <16.2 psia or 1116 mbarπŸ“ Piston open @ PISA = 16.2 psia +/- 0.3 PSI or 1.5 psig +/- 0.3 PSIβš›οΈ Made of stainless steel ## Features - πŸ‘‘ Improved version. The valve body is made of 1pcs stainless steel, minimizing potential leaks. - πŸ’₯ Prevent excessive positive pressure build-up in pumps or vacuum chambers - 🚿 Spring loaded piston pushed open when chamber pressure > 16.2 psia /1.5 psig / 1116 mbar - πŸ”’ Spring loaded piston close when chamber pressure < 16.2 psia (1.5psig) or 1116 mbar - πŸ‘Œ Prevent accidental vacuum chamber overpressure and damage to viewports, feedthroughs & pumps - βš›οΈ Made of stainless steel, ISO-KF25 KF25 NW25 flange ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0D2588Z6Y | | Best Sellers Rank | #252,972 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #272 in Relief Valves | | Brand Name | BROWNIAN MOTION TECHNOLOGY | | Connector Type | Flanged | | Customer Reviews | 4.0 4.0 out of 5 stars (1) | | Exterior Finish | Stainless Steel | | Inlet Connection Size | 40 Millimeters | | Inlet Connection Type | Flange | | Manufacturer | BROWNIAN MOTION TECHNOLOGY | | Material Type | Stainless Steel | | Maximum Pressure | 16 Pound per Square Inch | | Model Number | BMT-PRV-S-KF25 | | Number of Pieces | 1 | | Number of Ports | 2 | | Outlet Connection Size | 25 Millimeters | | Outlet Connection Type | Flange | | Size | 40mm inlet, 25mm outlet | | Specification Met | ISO, ASTM | | Thread Size | 25 millimeters | | Thread Type | KF | | Unit Count | 1.0 Count | | Valve Type | Pressure Relief Valve | ## Product Details - **Brand:** BROWNIAN MOTION TECHNOLOGY - **Exterior Finish:** Stainless Steel - **Inlet Connection Size:** 40 Millimeters - **Inlet Connection Type:** Flange - **Material:** Stainless Steel - **Maximum Operating Pressure:** 16 Pound per Square Inch - **Number of Ports:** 2 - **Outlet Connection Size:** 25 Millimeters - **Outlet Connection Type:** Flange - **Specification Met:** ISO, ASTM ## Images ![bmotiontech over pressure relief valve keeps vacuum chamber below excessive positive pressure < 1.5psig, improved version, One-piece valve body, minimized potential leak (KF25 flange) - Image 1](https://m.media-amazon.com/images/I/516mAteAATL.jpg) ![bmotiontech over pressure relief valve keeps vacuum chamber below excessive positive pressure < 1.5psig, improved version, One-piece valve body, minimized potential leak (KF25 flange) - Image 2](https://m.media-amazon.com/images/I/61Y459hXUZL.jpg) ![bmotiontech over pressure relief valve keeps vacuum chamber below excessive positive pressure < 1.5psig, improved version, One-piece valve body, minimized potential leak (KF25 flange) - Image 3](https://m.media-amazon.com/images/I/711GcbCyn5L.jpg) ![bmotiontech over pressure relief valve keeps vacuum chamber below excessive positive pressure < 1.5psig, improved version, One-piece valve body, minimized potential leak (KF25 flange) - Image 4](https://m.media-amazon.com/images/I/61sjhJY10HL.jpg) ## Available Options This product comes in different **Style** options. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/646866433-bmotiontech-over-pressure-relief-valve-keeps-vacuum-chamber-below-excessive](https://www.desertcart.co.uk/products/646866433-bmotiontech-over-pressure-relief-valve-keeps-vacuum-chamber-below-excessive) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-13*