MAX FLOW SIZES FROM 10 TO 160 GPM (60 TO 600 LPM) MAX LIQUID PRESSURE 300 PSI (20.69 BAR) Flow rate indicator with switch(es) or transmitter MN WATER MN Series, "A" style control box Flow meters, Flow switches and Flow transmitters For Water CSA Certied NRTL/C CE Marked (as noted) NIST Traceable Calibration Certicate Available DESCRIPTION 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, dials and cams. They are very hardy. Readout is visual with a pointer and scale combined with either switches or a 4-20 mA transmitter. CONSTRUCTION MATERIALS The materials of construction are wetted parts of brass and Nylon with 316 SS internal moving parts and Buna-N seals. C D F A G B LINE CONNECTION Ports are threaded and can be NPT (1/2 to 2 inch) or SAE straight thread. Metric threads such as BSPP or BSPT are also available. CALIBRATION All ow meters are individually calibrated for water. For NIST Traceability please consult factory. NOTE: This is a simplied model code and does not include standard options like other materials of construction, internal moving parts, seals, anges, pressure ratings, multiple switches etc. which can be found in other catalog sheets. 1 E 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.

HOW TO ORDER Select appropriate symbols and build a model code number, as in example shown: EXAMPLE: SERIES Normal pressure (300 PSI) MN - B I B 7ØGM - 8- 32V1.Ø - = MN HOUSING MATERIAL Brass with nylon ow chamber INTERNAL MOVING PARTS 316 Stainless Steel SEAL MATERIAL Buna N = B = I = B MAX FLOW RATE LIQUIDS GPM 1Ø, 15, 2Ø, 3Ø, 4Ø, 5Ø, 6Ø, 7Ø LPM 4Ø, 5Ø, 6Ø, 7Ø, 8Ø, 9Ø, 1ØØ, 15Ø, 2ØØ, 25Ø CMH 2.25, 2.5, 3, 4, 5, 6, 7, 8, 9, 1Ø, 15 Pipe size and attachment method = = = GM LM CMH THREADED ATTACHMENT Pipe Size NPT BSPP In Inches 1/2 4 8BP 3/4 6 12BP 8 16BP 1 1 1/4 1Ø 2ØBP 1 1/2 12 24BP 2 16 BSPT...

A1 W SERVICE Oil and dust tight (Type 12) = Weatherproof (Type 4) = Weatherproof, corrosion proof (Type 4X) = = = = = E- 1ØD N W X FLOW DIRECTION Left to right Right to left Up Down L- R L U D SPECIAL OPTIONS Stainless steel ID tag for customer supplied information = Manual override (Required for eld change of set point for switch) = ST E SWITCH SETTING No symbol = Lowest possible setting (usually 10% of maximum ow) Desired set point is assumed to be in ow units already selected (GPM). Give ow rate 1ØD followed by a “D” for ow going down (ow failure) or a “U” for ow going up. Example, 1ØD indicates...

ENGINEERING DATA Maximum uid temperature: 200°F (95°C) Maximum ambient temperature: 150°F (65°C) Readout accuracy, full scale: ±2% Series MN max. operating pressures: (3:1 safety factor): 300 PSI (20.69 BAR) Repeatability of setpoint is 1% of actual ow FLOW & PRESSURE DROP Units with max ows to 80 GPM (300 LPM) impose a pressure drop that increases with ow from 1.9 to 3.8 PSI. Higher ow-rated models are made possible by having either a partial bypass (which raises minimum indicated ow), dual springs (which raises the pressure drop), or both. The table shows minimum ow rates and pressure drops...