The Spence type ED pilot-operated pressure regulator revolutionized the way energy producers supplied low-pressure steam to their customers by providing greatly improved accuracy in pressure control. Accuracy, dependability and low maintenance costs soon made pilot-operated regulators the standard throughout the steam industry. This method of steam reduction and distribution is still one of the most accurate methods of HVAC and process control available today.
Spence continues its "History of Innovation" by continuing to develop and manufacture quality steam specialty and fluid control products and solutions for the HVAC and industrial marketplace. Spence has introduced several innovative, cost-saving products to the HVAC and industrial process markets including the type "J" Series Pneumatic Control Valve (1986), "Nova" NFT Series Variable Orifice Steam Traps - the first "Made In The USA" free float steam trap (1992), CDH Series patented thermostatic sanitary steam trap (2001) and the "CoMBo" CME Series - the industry's first condensate measuring elbow thermostatic steam trap (2006).