Neptune 520-VS-N3

• Handles moderate viscosity fluids.
  
• Standard flat diaphragm.
  
• Large internal porting with a large, single ball, suction check valve.
  
• Capacities to 30 gph (113 lph) at 100 psi (8 kg/cm2).
  
• Available in all 316SS with SS trim.
  
• Electric or pneumatic stroke control options and variable speed drives.
  
• Variable Oil By-pass» stroke adjustment mechanism provides better valve performance than variable linkage designs.
  
• Teflon diaphragm withstands most chemicals. Variable Oil By-pass stroke adjustment allows an adjustable time delay between the end of the suction stroke and the beginning of the discharge stroke. This delay permits the ball to seat fully before pumping resumes, even in the heaviest liquids, so that pumping accuracy remains high.