National Pump has a complete line of API-610 type VS-0 submersible, VS-1 sump, and VS-6 canned vertical turbine pumps for the Petroleum market conforming to the latest edition of the API-610 standard. Applications include:
6” – 30” Hydraulics; Flows to: 25,000 GPM; Heads to: 2,000 PSIG (4,620 feet); up to 2,500 HP
Standard or Thrust Balanced hydraulic designs
Engineered Fabricated Steel Discharge Heads and Column Assemblies
Pump Components available in all API Material Classes: Cast & Ductile Iron (S-1 to S-6); Steels, Stainless Steels, Duplex & Super Duplex
Flanged Column Construction with a variety of bearing materials
Mechanical Seals & Lubrication Systems per API standards
Certifications: ISO 9001 Certified Quality Management System
Testing to API-610 compliance standards
All pump models are stocked in standard materials of construction and can be customized to meet your exact specifications at our various manufacturing locations.
*National Pump is a Member of the American Petroleum Institute
Does National Pump stock Stainless Steel impellers?
Yes, National Pump stocks both 304 & 316 grade stainless steel impellers, up through 15” designs with NO performance corrections.
What is NPSHR (Net Positive Suction Head Required) mean on the performance curve?
NPSHR is the minimum pressure required at the first impeller of the pump to keep the pump from cavitating (i.e. turning water to water vapor in the pump). This differs from NPSHA (available) which is the absolute pressure at the pump suction. Both values are represented in ‘feet’ of pressure. NPSHA must be a minimum of 3 feet more than NPSHR.
