Series 8221 valves are 2-way normally open, internal pilot-operated solenoid valves designed for soft closing. Valves are made of forged brass with internal parts of brass or stainless steel and elastomers of Buna N, or ethylene propylene, depending upon service requirements. Valves may be provided with a general purpose or explosion-proof/ watertight solenoid enclosure.

Features
• Pilot operated, normally open or normally closed
• Snubber slows disc closing speed to protect system against water hammer damage more effectively than other techniques
• Pressure spike due to water hammer is reduced to a point eliminating the need for suppressors or other controls in most water systems
• Fluid Controls Institute Inc. evaluations have classified these valves: