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Item: NP4F
Description: NP4F sliding vane pump, for high temperature, high pressure, and high viscosity requirements.
NP4F-product image
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NP4F, Vane Pump, Single Ended, Cast Iron, 525 GPM

Item: NP4F
Description: NP4F sliding vane pump, for high temperature, high pressure, and high viscosity requirements.
  • Mounting: PUMP ONLY
  • Inlet Size: 4
  • Model: NP4F
  • Discharge Size: 4
  • Max Operating Pressure: 225.0
  • Max Flow Rate (GPM): 525.0
Attributes for item NP4F
Shipping Weight (lbs):
314
Accessories:
0 None
Bypass Valve Relief Valve Spring Setting:
0
Elastomers:
2 FKM ELASTOMERS
Flanges:
N NPT FLANGES
Mounting:
PUMP ONLY
Relief Valve:
1 STANDARD VALVE
Rotor and Shaft:
1R SINGLE END KEYED RH
Relief Valve Spring Setting:
63
Relief Valve Spring:
3 51-75 PSI STEEL RV SPRING
Standard Construction 1:
0 STANDARD SELECTION - SC1
Standard Construction 2:
0 STANDARD SELECTION - SC2
Standard Construction 3:
0 STANDARD SELECTION - SC3
Standard Construction 4:
0 STANDARD SELECTION - SC4
Seal:
G0 PTFE PACKING
Standard Relief Valve Spring Setting:
1
Vanes:
4 DURAVANE
TOTAL-LEAD-TIME:
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Spare Parts for item NP4F
Performance for item NP4F

At 100 RPM and 100 psi differential pressure, the NP4/NPH4 pump delivers 100 gpm (380 lpm) and requires 8.0 bhp (6.0 kW) with a fluid viscosity of 75,000 SSU.

At 500 RPM and 100 psi differential pressure, the NP4/NPH4 pump delivers 510 gpm (1,930 lpm) and requires 42 bhp (31 kW) with a fluid viscosity of 7,500 SSU.

Item Overview for Blackmer NP4F
The Blackmer NP4F is a Blackmer vane pump designed as NP4F, Vane Pump, Single Ended, Cast Iron, 525 GPM for precise matching within fluid-handling systems. Its construction brings together Pump Only, and PTFE Packing, and NPT Flanges, and FKM Elastomers, presenting the main operating elements as one clearly defined build for technical evaluation. The product connects its intended function with the construction and configuration details that matter when equipment is evaluated for service. Within Blackmer’s process offering, it gives teams a recognizable option for comparing equipment, planning service work, or documenting installed assets. For technical buyers and service professionals, this item creates a clear path from product search to equipment evaluation. The description emphasizes functional context, Blackmer identity, and meaningful configuration details so readers can assess relevance with confidence.