MAX FLOW SIZES FROM 0.5 TO 20 GPM (2 TO 75 LPM) MAX LIQUID PRESSURE 300 PSI (20.69 BAR) Flow rate indicator with switch(es) or transmitter. SN LUBE Flow meters, Flow switches and Flow transmitters For Circulating Lubrication Oil SN Series shown with “A” style control box DESCRIPTION CONSTRUCTION MATERIALS These are variable area meters with a spring biased semi-circular vane that opens wider with more ow. They are installed in-line in any position. Straight pipe runs before or after the meter are not required. The simple mechanical connection directly drives pointers, switches and transmitters. The body is aluminum with nylon. Internal moving parts are stainless steel. Seals are Buna-N. CALIBRATION All ow meters are individually calibrated for uids with the viscosity you specify (up to 3000 SSU/660 Centistokes). We also compensate for your uid’s specic gravity. For NIST Traceability please consult factory. FLOW & PRESSURE DROP Max Flow in GPM (LPM) 8 (32) 9-12 (45) 15 (56) 16 (60) 20 (75) Pressure drop in PSI Min Max 1.9 2.5 1.9 4 1.9 5 1.9 5.5 1.9 6 F C LINE CONNECTION Ports are threaded. Threaded ports can be NPT (1/4 to 3/4") or SAE straight thread (1/4 to 5/8"). Metric threads such as BSPP or BSPT are also available. D A B G E ENGINEERING DATA Maximum uid temperature: 200°F (95°C) Maximum ambient temp: 150°F (65°C) Series SN max. operating pressure: 300 PSI (20.69 BAR) Readout accuracy, full scale: ±5% Switch repeatability is 1% of actual ow INSTALLATION Flow monitors mount in-line and are typically supported by rigid pipe. 1 Fluid enters at A, passes around the semi-circular vane B. exits at outlet C. The vane resists the ow because of the spring D. The further the vane is pushed the larger the passageway E becomes. This minimizes the pressure drop. The vane shaft turns to operate the pointer F and remote signal devices such as the switch G.

A1 W SERVICE Oil and dust tight (Type 12) = Weatherproof (Type 4) = Weatherproof, corrosion proof (Type 4X) = = = = = ST - 2D N W X FLOW DIRECTION Left to right Right to left Up Down L- R L U D SPECIAL OPTIONS High vibration modication (Order with A1B switch below) Stainless steel ID tag = = ZRL ST SWITCH SETTING Desired set point is assumed to be in ow units already selected (GPM). Give ow rate followed by a “D” for ow going down (ow failure) or a “U” for ow going up. Example, 2D indicates a setting of 2 GPM in declining ow. Leaving this blank will result in the switch being set at the minimum...