Needle Type Constant Flow ValvesFPC series

  • Maintains a constant flow rate regardless of differential pressure variations before and after the valve.
  • Adopts a simple structure for a long service life, high durability and maintenance-free operation.

This valve maintains a constant flow rate without the need for a power source or external operation.

Fluid Water
Temperature MAX 100C
Pressure Difference 0.05~0.7MPa / 0.07~0.7MPa 
Size 8-15A
Flow rate Accuracy ±10%
Option Other Liquid


Valve Specification

Model Connection Control Pressure Difference[MPa] Flow[L/min] MAX Pressure[MPa] Weight
Size Type
FPC-N8P-□□ 1/4″ Rc 0.05~0.7 0.7 1.0 1.5 2.0 1 0.2
FPC-N10P-□□ 3/8″ 1.5 2.0 2.5 3.0 4.0 5.0 0.2
FPC-N15P-□□ 1/2″ 4.0 5.0 7.0 0.3
FPC-N15P-10 1/2″ 0.07~0.7 10 0.3

※□□ represents flow rate.

Main Parts List

No Name of Parts Materials
1  Body SUS304
2 Needle SUS304
3 Spring SUS304
4 C Ring SUS304


Model Size Dimension [mm]
FPC-N8P-□□ 1/4 50 19
FPC-N10P-□□ 3/8 55 23
FPC-N15P-□□ 1/2 65 26

*□□ represents flow rate.

Other Specifications・Options

Option Other Liquid

*Precaution Statement
1. Set same size of straight run of pipe with constant flow valve in back and forth of it.  
    primary side : over size × 5 mm  Secondary side : over Size ×10mm
2. Vibrations and noise may occur by usage situation, piping configuration and pump characteristics.

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