John Moncrieff Limited

Die Formed Packing Rings are an essential parts of any valve. Fitting around the spindle the ensure it's smooth action and the prevent leakage. The effective sealing properties, combined with the ease with which it can be removed and replace ensure graphite is the material of choice. Moncrieff rings are designed to suit every brand of valve from the smallest up to the largest globe and gate valves. With over 40,000 types of valve on the market. If we don't have them in stock we can make them for you. Moncrieff seals can be used to seal hot water, high temperature and pressure steam, heat transfer fluid, hydrogen gas, ammonia, organic solvents, hydrocarbons, cryogenic liquids etc.