The rotary valve is equipped with a tight shutoff and the long seal life capability of the valve, make it ideal for on/off applications. Complete shutoff is made possible by the pressure-assisting action of the valve seal ring. The opening and closing path of the eccentric valve disk minimizes contact with the seal ring, thereby reducing seal wear. Interchangeable sealing technology allows the valve body to accept both soft and metal seals. The POSI-SEAL valve is highly suited to automated on-off, quarter-turn performance and is typically used with the FieldQ® rack-and-pinion actuator. The valve is available to ship in two weeks to meet day-to-day and emergency needs. It installs easily in either a horizontal or vertical orientation with no detriment to performance or cycle-life.