p> pratt offers a wide variety of actuator styles to suit a multitude of applications. the pratt valve is available with manual, buried service, submersible service, hydraulic or pneumatic, and electric actuators. every actuator is specifically designed for long life in utility service with minimum maintenance. actuators for open/ close service, throttling or modulating service are all.
established in 1970, positron is a holding and operating company that develops and manufactures telecommunications equipment for high reliability, critical service applications. positron products such as thousands ofsystems, and core central office equipment have been standardized by all u. major telephone companies and.