Daniel 788 Digital Liquid Control Valve

Daniel

Daniel 788 Digital Liquid Control Valve

Daniel

Preferred worldwide for loading and off-loading of liquid petroleum products, the Daniel™ 788 Digital Control Valve tightly controls the flow rate and provides batching capabilities when installed with an electronic batch control device or preset. The high-capacity valve offers smooth linear action for maximum flow and minimum pressure drop with the preset automatically controlling low-flow start-up, high-flow rate control, low-flow shutdown and final shutoff. The valve has no diaphragms or stuffing boxes and the seat and seat ring can be removed as a cartridge assembly to simplify maintenance. An aggressive-products option is available for alcohols, MTBE, TAME, reformulated fuels and other challenging additives or oxygenates.

Features

  • Rely on uniform speed of response with the main piston ensuring uniform opening and closing of the valve
  • 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, 45° piston operation
  • Control pressure from 60 to 9928 kPa (10 to 1440 psi) within ±13.8 kPa (±2 psi) of setpoint
  • Improve reliability with positive O-ring seal and valve seats not affected by fluid viscosity and pressure drop
  • Protect equipment and personnel with positive shutoff (ANSI Class VI) and fail-safe closure upon power loss
  • 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

Specifications

Line Size
DN50 to DN200 (2-in to 8-in)
Fluid Type
Liquid
Operating Temperature Range
-29°C to +66°C (-20°F to +150°F)
Operating Pressure Range
ANSI 150 to 300
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 300 (6-in to 8-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 (8-in) Carbon Steel, Nickel Coated
Materials: O-Rings
Standard: Viton; Optional: Neoprene, EPR, Kalrez / Teflon AP (Aggressive Products)

Documents & Drawings

Training & Services