---
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: "R1965"
currency: ZAR
in_stock: true
category: "Brownian Motion Technology"
url: https://www.desertcart.co.za/products/646866433-bmotiontech-over-pressure-relief-valve-keeps-vacuum-chamber-below-excessive
store_origin: ZA
region: South Africa
---

# 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:** R1965
**Availability:** ✅ In Stock

## Summary

> 🛠️ Keep your vacuum chamber safe and sound — 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?** R1965 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/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

- • **Precision Pressure Control:** Automatically opens at 1.5 psig to protect your vacuum system from damage.
- • **Compact & Lightweight Design:** At just 4.2 ounces, it fits effortlessly into your setup without bulk.
- • **Robust Stainless Steel Build:** Single-piece valve body ensures durability and virtually zero leak potential.
- • **Spring-Loaded Safety Mechanism:** Reliable piston action prevents overpressure and safeguards sensitive components.
- • **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

💥 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 mbar🔒 Spring loaded piston close when chamber pressure <16.2 psia or 1116 mbar📝 Piston open @ PISA = 16.2 psia +/- 0.3 PSI or 1.5 psig +/- 0.3 PSI⚛️ Made of stainless steel

## Features

- 👑 Improved version. The valve body is made of 1pcs stainless steel, minimizing potential leaks.
- 💥 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
- 🔒 Spring loaded piston close when chamber pressure < 16.2 psia (1.5psig) or 1116 mbar
- 👌 Prevent accidental vacuum chamber overpressure and damage to viewports, feedthroughs & pumps
- ⚛️ Made of stainless steel, ISO-KF25 KF25 NW25 flange

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D2588Z6Y |
| Batteries Required? | No |
| Best Sellers Rank | #293,175 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #342 in Relief Valves |
| Brand | BROWNIAN MOTION TECHNOLOGY |
| Customer Reviews | 4.0 4.0 out of 5 stars (1) |
| Date First Available | April 19, 2024 |
| Exterior Finish | Stainless Steel |
| Finish | Stainless Steel |
| Inlet Connection Size | 40 Millimeters |
| Inlet Connection Type | Flange |
| Item Weight | 4.2 ounces |
| Item model number | BMT-PRV-S-KF25 |
| Manufacturer | BROWNIAN MOTION TECHNOLOGY |
| Material | Stainless Steel |
| Maximum Operating Pressure | 16 Pound per Square Inch |
| Number of Ports | 2 |
| Outlet Connection Type | Flange |
| Package Dimensions | 4 x 2.75 x 1.75 inches |
| Part Number | BMT-PRV-S-KF25 |
| Size | 40mm inlet, 25mm outlet |
| Specification Met | ISO, ASTM |
| Style | KF25 flange Ver.B |

## Product Details

- **Brand:** BROWNIAN MOTION TECHNOLOGY
- **Exterior Finish:** Stainless Steel
- **Inlet Connection Size:** 40 Millimeters
- **Inlet Connection Type:** Flange
- **Manufacturer:** BROWNIAN MOTION TECHNOLOGY
- **Material:** Stainless Steel
- **Maximum Operating Pressure:** 16 Pound per Square Inch
- **Number of Ports:** 2
- **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/21yBZGBI-rL.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/316ZEmUGWAL.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/31Z7my+WWJL.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/41t0YUcw9YL.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 5](https://m.media-amazon.com/images/I/516mAteAATL.jpg)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-03*