or visible external leakage around the bonnet

Environmental Protection: The NEMA 4X rated housing ensures durability in wash-down and corrosive industrial environments

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Industrial Durability: Engineered to withstand the frequent cycling of commercial boiler systems

Spence Engineering A85 Pilot Els PW 17895 or visible external leakage aroundThe Spence Engineering A85 Pilot is a high performance air adjusted pilot designed for industrial steam pressure regulation where remote adjustment is required. Built with a rugged cast iron body and stainless steel trim, this pilot is engineered to withstand the rigors of heavy duty boiler rooms and district heating plants. It features a unique 3 7 8: 1 air ratio, allowing technicians to use low pressure air signals to control high pressure steam