DS-VA-CART III-eng January, 2017 Data Sheet Brooks® Cartridge Valve Variable Area Brooks Cartridge Valve Brooks Cartridge III Valve for Gas and Liquid Applications Overview The Cartridge III Valve is a multipurpose valve, designed for gas and liquid flow applications. It is interchangeable with previous versions of Brooks valves. These valves come in three different sizes – low, medium and high flow. The stem is conical tapered at the end and it has two orifice sizes that provide a wide choice of flow ranges for all models. A Teflon piece is crimped into the valve body which gives better setability, repeatability and feel of operation. Product Features Product Features • • • • • Eight turns open-to-close Large knob Excellent setability and repeatability Rugged design Interchangeability - For use with all Brooks purgemeters Product Product Specifications Specifications Capacities Maximum Operating Pressure* Maximum Operating Temperature* Dimensions Brooks Cartridge Valve See Capacity Tables 2000 psi (138 bar) 400°F (200°C) See Dimensions Figure Materials of Construction: Valve Body and Stem Orifice Valve Ring O-Rings 316 Stainless Steel PEEK Arlon® 1126 15% glass filled Teflon ® (PTFE) Standard: Viton® fluoroelastomers; Optional: Buna, Kalrez ®, EPR, Teflon ®, Butyl Phenolic (Thermoset) Knob * These ratings are for the cartridge valve only. The valve rating shall supersede any higher equipment rating. A lower equipment rating shall supersede the

Product (Continued) Product Specifications (Continued) Product Product Dimensions Capacity Table (United States Customary Units) Valve Size Low Medium High ** Capacities measured with 10 psig supply and atmospheric pressure exhaust. Flow capacities will vary for different gases, liquids and pressures. Standard temperature 70°F, standard pressure 14.7 psia. Capacity Table (Standard International Units) Valve Size Low Medium High *** Standard capacities measured with 1 barg supply and atmospheric pressure exhaust. Flow capacities will vary for different gases, liquids and pressures. Standard temperature...

Cartidge Valve Sizing GAS - United States Customary Units The correct cartridge valve can be determined for any gas by using one of the formulas below: GAS - Standard International Units The correct cartridge valve can be determined for any gas by using one of the formulas below: 1. Subcritical Flow Formula (when downstream pressure, P2, is greater than the critical pressure PC, or P1< 2P2) 1. Subcritical Flow Formula (when downstream pressure, P2, is greater than the critical pressure PC, or P1< 2P2) 2. 2. Critical Flow Formula (when downstream pressure, P2, is less than the critical pressure...

Brooks Brooks Service and Support Brooks is committed to assuring all of our customers receive the ideal flow solution for their application, along with outstanding service and support to back it up. We operate first class repair facilities located around the world to provide rapid response and support. Each location utilizes primary standard calibration equipment to ensure accuracy and reliability for repairs and recalibration and is certified by our local Weights and Measures Authorities and traceable to the relevant International Standards. Visit www.BrooksInstrument.com to locate the service...