Flow Rate Settings: 0.1 GPM to 1.0 GPM
Port Size: 1/4˝ NPT
Primary Construction Material: Brass
Setting Type: Fixed
A unique, patented piston design assures accuracy within 20% over a full range of
viscosities—from 40 to 1000 SSU. Ideal for use in applications where liquids of different
viscosities are blended; or for use in lubrication systems where oil f ow monitoring is
critical at start-ups. Switch compensates for viscosity changes automatically. Each unit
is factory preset, using 300 SSU oil, for actuation at specif ed f ow rate
Wetted Materials
Housing Brass
Piston Brass
Spring 316 Stainless Steel
O-Ring Viton®
Other Wetted Parts Epoxy
Pressure Rating
Operating, Maximum 1000 PSIG
Proof 2500 PSIG
Burst 5000 PSIG
Operating Temperature -20°F to + 300°F (-29°C to +148.9°C)
Repeatability 1% Maximum Deviation**
Set Point Accuracy ±10%
Set Point Differential 15% Maximum
Switch* SPDT, 20 VA
Inlet/Outlet Ports 1/4˝ NPT
Electrical Termination No. 18 AWG, 24˝ L., Polymeric Lead Wires
Explosion-Proof Approvals U.L. Approved for Class I, Division 2, Groups A, B,
C, D. Also available with FM approved, explosion
proof junction box for Class I, Division 1, Group D
hazardous locations.
51582 |
51586 |
51590 |
51594 |
51598 |