Master Stocking Distributor & Valve Automation Shop
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Backpressure
GA Figure 3670-DR
GA Figure 3670-DR
Backpressure
Size:
2" to 36"
Type:
Water Control Valve
GA Industries Figure 3670-DR Altitude Valves are self-contained, hydraulically operated, differential piston actuated valves.The valves are installed on the tank fill line and reliably close when the tank is full to prevent overflow and automatically re-open to replenish the tank when the water level falls 6” to 12” below maximum.The backpressure pilot throttles the valve as needed to sustain a minimum inlet pressure.__The valve’s unique V-port trim provides semi-linear flow control while opening and closing for ideal surge control plus full port capacity to minimize head loss.__GA Industries Figure 3670-DR altitude valves are often installed on low level ground storage tanks to sustain the upstream system pressure while the tank is being filled.__The valve can be supplied with an optional solenoid to override the hydraulic controls and close the valve anytime upon electrical signal and/or a differential level pilot to delay re-opening in order to allow tank drawdown.__
Characteristics
Heavy duty cast iron body with lead-free bronze internals for long term dependable service __V-port trim for excellent flow control plus full port capacity __Visual position indicator __Closing speed needle valve __Wye strainer and pilot isolating valves __Super sensitive pilot for accurate and repetitive water level control
Material
Body: Cast Iron, ASTM A126 Class B __Cover: Steel, ASTM A36 __Internal Trim: Lead-free Bronze __Renewable Seat: Buna-N __Internal Fasteners: Stainless Steel __External Fasteners: Steel, A307, Zinc Plated __Pilot System: Stainless Steel, Lead Free Brass, Bronze or Copper
Corrosion Protection
Minimum 6 mil Internal and External 2-Part NSF-61 Carboline 891 Epoxy