--- product_id: 805793725 title: "KF40 Vacuum Butterfly Valve 304 Stainless Steel with FKM O-Ring & Black Handle, High-Temp Corrosion Resistant for Industrial Vacuum Pumps" brand: "qminox" price: "$396.52" currency: USD in_stock: true category: "Qminox" url: https://www.desertcart.us/products/805793725-kf40-vacuum-butterfly-valve-304-stainless-steel-with-fkm-o store_origin: US region: United States of America --- # Leak rate <1x10^-9 mbar·L/s ultra-tight seal Operates -20°C to +250°C high-temp range 304 Stainless Steel corrosion resistance KF40 Vacuum Butterfly Valve 304 Stainless Steel with FKM O-Ring & Black Handle, High-Temp Corrosion Resistant for Industrial Vacuum Pumps **Brand:** qminox **Price:** $396.52 **Availability:** ✅ In Stock ## Summary > 🔧 Seal the deal with precision and power! ## Quick Answers - **What is this?** KF40 Vacuum Butterfly Valve 304 Stainless Steel with FKM O-Ring & Black Handle, High-Temp Corrosion Resistant for Industrial Vacuum Pumps by qminox - **How much does it cost?** $396.52 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/805793725-kf40-vacuum-butterfly-valve-304-stainless-steel-with-fkm-o) ## Best For - qminox enthusiasts ## Why This Product - Trusted qminox brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision Vacuum Sealing:** Maintains ultra-low leak rates (<1x10^-9 mbar·L/s) ensuring flawless vacuum integrity for sensitive applications. - • **Ergonomic Quick-Actuation:** Smooth 90° black aluminum lever with non-slip grip enables fast, safe valve control—even with gloves on. - • **Wide Temperature Tolerance:** Operates reliably from -20°C to +250°C, perfect for aggressive chemicals and high-purity labs. - • **Industrial-Grade Durability:** 304 Stainless Steel body resists corrosion and wear for long-lasting performance in harsh environments. - • **Seamless System Integration:** Designed for KF40 flanges, fits ISO-KF vacuum setups, mass spectrometers, and industrial pumps to minimize downtime. ## Overview The KF40 Vacuum Butterfly Valve features a robust 304 stainless steel body paired with a high-performance FKM O-ring, delivering exceptional corrosion resistance and vacuum tightness. Engineered for demanding industrial and laboratory environments, it withstands extreme temperatures (-20°C to +250°C) and aggressive chemicals. Its precision design ensures leak rates below 1x10^-9 mbar·L/s, while the ergonomic black aluminum lever offers quick, secure operation. Compatible with KF40 flanges and ISO-KF systems, this valve guarantees seamless integration and reduced maintenance downtime. ## Description QMINOX Vacuum Ball Valve 304 Stainless Steel Clamp Valve with Locking Device (KF-25) is a high-quality valve used in vacuum applications. The valve is made of 304 stainless steel, a durable and corrosion-resistant material that ensures a long service life. It features a locking device that helps to prevent accidental opening or closing of the valve, providing an added layer of safety. The clamp valve design makes it easy to install and remove the valve when necessary, reducing downtime during maintenance. The valve is compatible with KF-25 vacuum flanges, making it a suitable choice for a wide range of vacuum applications. Whether you are working in a laboratory, industrial setting, or other vacuum system, the QMINOX Vacuum Ball Valve is an excellent choice for ensuring reliable and safe operation. ## Features - Constructed with 304 Stainless Steel Body and FKM (Fluorocarbon) O-Ring, This KF25 Vacuum Valve Ensures Corrosion Resistance, Withstands Temperatures from -20°C to +250°C, Ideal for Aggressive Chemicals and High-Purity Environments like Semiconductor Labs. - Precision-Engineered Butterfly Valve Maintains Leak Rates <1x10^-9 mbar路L/s, Compatible with High-Vacuum (10^-6 mbar) and Pressure Systems up to 10 bar, Ensuring Stable Sealing in Thin Film Deposition or Analytical Instruments. - Quick-Actuating 90° Black Aluminum Lever Handle Offers Smooth Operation with Minimal Torque, Featuring Non-Slip Texture for Safe Control in Gloved Hands During Industrial or Cleanroom Procedures. - Designed for KF25 (DN25) Flanges, Seamlessly Integrates with ISO-KF Vacuum Components, Mass Spectrometers, Vacuum Chambers, and Industrial Pumping Systems, Reducing Downtime for Upgrades or Repairs. - Polished Stainless Steel Surface Resists Particle Adhesion, While FKM Seals Prevent Degradation from Oils or Solvents. Pre-Assembled with Alignment Pins for Hassle-Free Installation. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0F482ZB18 | | Best Sellers Rank | #1,363,834 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #5,568 in Ball Valves | | Brand Name | QMINOX | | Manufacturer | Saipu | | Manufacturer Part Number | VBK01H2431K40NNS1 | | Material Type | Stainless Steel | | Model Number | VBK01H2431K40NNS1 | | Size | KF40 | | UPC | 688397551369 | | Unit Count | 1 Count | ## Product Details - **Brand:** QMINOX - **Manufacturer:** Saipu - **Material:** Stainless Steel - **UPC:** 688397551369 - **Unit Count:** 1 Count ## Images ![KF40 Vacuum Butterfly Valve 304 Stainless Steel with FKM O-Ring & Black Handle, High-Temp Corrosion Resistant for Industrial Vacuum Pumps - Image 1](https://m.media-amazon.com/images/I/518Gt7cPfqL.jpg) ![KF40 Vacuum Butterfly Valve 304 Stainless Steel with FKM O-Ring & Black Handle, High-Temp Corrosion Resistant for Industrial Vacuum Pumps - Image 2](https://m.media-amazon.com/images/I/51Z542yGI4L.jpg) ![KF40 Vacuum Butterfly Valve 304 Stainless Steel with FKM O-Ring & Black Handle, High-Temp Corrosion Resistant for Industrial Vacuum Pumps - Image 3](https://m.media-amazon.com/images/I/51fGkZofW8L.jpg) ![KF40 Vacuum Butterfly Valve 304 Stainless Steel with FKM O-Ring & Black Handle, High-Temp Corrosion Resistant for Industrial Vacuum Pumps - Image 4](https://m.media-amazon.com/images/I/51e9zXN1+6L.jpg) ![KF40 Vacuum Butterfly Valve 304 Stainless Steel with FKM O-Ring & Black Handle, High-Temp Corrosion Resistant for Industrial Vacuum Pumps - Image 5](https://m.media-amazon.com/images/I/516YTAQDjUL.jpg) ## Available Options This product comes in different **Size** options. --- ## 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.us/products/805793725-kf40-vacuum-butterfly-valve-304-stainless-steel-with-fkm-o](https://www.desertcart.us/products/805793725-kf40-vacuum-butterfly-valve-304-stainless-steel-with-fkm-o) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-05*