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Daniel, Series 7NL Nitrogen Loaded Control Valve, 8 IN (DN200)
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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.

Daniel Series 700 Liquid Control Valves

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Daniel, Series 7NL Nitrogen Loaded Control Valve, 8 IN (DN200)

Specs

Line Size
DN50 to DN400 (2-in to 16-in)
Fluid Type
Liquid
Operating Temperature Range
-29°C to +66°C (-20°F to +150°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; Optional: Neoprene, EPR, Viton, all Buna-N, Kalrez / Teflon AP (Aggressive Products)

Features

  • Achieve precise flow rate and batch control with high-performance balanced piston principle, spring-biased design
  • Avoid damage due to shock pressure by adjusting closing speed; main piston ensures uniform opening and closing
  • Ensure smooth linear action with maximum flow and minimum pressure drop with high-capacity, 45° valve body
  • Control pressure from 10 to 1440 psi (60 to 9928 kPa) within ±2 psi (±13.8 kPa) of setpoint
  • Safeguard equipment and personnel with positive shutoff (ANSI Class VI) and fail-safe closure upon power loss
  • Improve reliability with positive O-ring seal and valve seats that are unaffected by fluid viscosity or pressure drop
  • 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

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