Tyco Flow Control has announced the addition of a new High Temperature seat for its Keystone Optiseal range of butterfly valves, which has been widely specified in the food and beverage industry for over a quarter of a century. The new Brewseal will extend the operational life of typical units in some common applications - especially in the onerous brewing conditions including hot wort - while still remaining competitive in price.
Importantly, the one-piece wafer-thin disc stem of the Keystone Optiseal combines high strength with positive disc control, while offering minimal disc obstruction to flow. The disc stem can be offered with a polished finish making it ideal for hygienic duty.
The new seat is rated for 150ºC constant service, while also offering excellent abrasion resistance for brewing a variety of other hygienic applications and semi-aggressive chemical industries. As with previous models, the primary seat formed by the seat/shaft/hub assembly exceeds the pressure rating of the valve, ensuring that the body is totally isolated from the flowing medium.
The valve body is also finished in silver Ameron PSX700, a unique high-gloss engineered siloxane to suit the rigorous requirements of the hygienic market.