Series 7NL Nitrogen Loaded Liquid Control Valves

Ideal for surge relief and back pressure control

High-performance Daniel® Series 700 Nitrogen-Loaded Control Valves (Models 762, 763, 765, 766 and 767) are engineered to instantaneously respond to pipeline surges and pressure to protect personnel and mitigate equipment damage. The rugged, reliable valves offer linear control and high flow capacity to accurately monitor maximum pipeline pressure or to maintain minimum back pressure. The valves have no external pilot controls and the cylinder, piston and seat ring can be removed as a cartridge assembly to simplify maintenance and minimize downtime.

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Line Size DN50 to DN400 (2-in to 16-in)
Fluid Type Liquid
Operating Temperature Range -26º C to +205º C (-15º F to +400º F)
Operating Pressure Range ANSI 150 to 600
Materials: Valve Body Carbon Steel, ASTM A352 GR LCC
Materials: Valve Cylinder DN50 to DN 200 (2-in to 4-in): Stainless Steel, ANSI 150 to 600; DN250 to DN 400 (6-in to 16-in) Carbon Steel, Nickel Coated, ANSI 150 to 600
Materials: Valve Piston Standard: Stainless Steel
Materials: Seat Ring DN50 to DN200 (2-in to 6-in) Stainless Steel; DN300 to DN400 (8-in to 16-in) Carbon Steel, Nickel Coated
Materials: O-Rings Standard: Viton Dynamic and Buna-N Static; Optional: Neoprene, EPR, Viton GFLT, all Buna-N AP (Aggressive
Products)
  • Achieve precise flow rate control on even dirty or viscous products with a balanced piston, spring-biased design
  • Avoid damage due to shock pressure with adjustable control of closing speed
  • Reduce pressure drop and maintenance compared to axial flow valves with high-capacity, 45º piston operation
  • Safeguard equipment and personnel with positive shutoff (ANSI Class VI) and fail-safe closure upon power loss
  • Lower operating costs with no nitrogen gas consumption
  • Maximize uptime with all internal parts housed in a cartridge assembly; no need to remove the valve from the line
  • Minimize wear-related maintenance with a simple design featuring no diaphragms or stuffing boxes
  • Ensure high integrity with threaded seat rings on all valve sizes