MN general with X transmitter
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MAX LIQUID PRESSURE 300 PSI (20.69 BAR) MN SERIES MAX LIQUID PRESSURE 500 PSI (34.48 BAR) MM SERIES MAX LIQUID PRESSURE 2000 PSI (137.93 BAR) MH SERIES MAX FLOW SIZES FROM 10 TO 160 GPM (60 TO 600 LPM) MN Series, "A" style control box Flow meters, Flow switches and Flow transmitters A Medium Vane-Style For Liquids CSA Certified NRTL/C CE Marked (as noted) NIST Traceable Calibration Certificate Available DESCRIPTION These are variable area meters with a spring biased semi-circular vane that opens wider with more flow. 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. Readouts The flowmeter has outputs both visual and electronic. Visual displays are either pointer (with inscribed scale) or numeric (digital LCD). Electronic outputs can be mechanical switch closure, 4-20 mA analog or both (for signal redundancy). The switches can be general purpose or rated for hazardous locations (all classes, groups and divisions). The 4-20 mA transmitters are Intrinsically Safe if used with approved barriers. CALIBRATION All flow meters are individually calibrated for fluids with the viscosity you specify (up to 3000 SSU/650 Centistokes). We also compensate for your fluid's specific gravity. For NIST Traceability please consult factory. CONSTRUCTION MATERIALS The meter body, internal moving parts, and seals are offered in a variety of materials to suit a wide range of applications, such as: water, synthetic and petroleum based oils, paint, corrosives and solvents. See selections in the “How to Order” section. LINE CONNECTION Fluid enters at A, passes around the semi-circular vane B, exits at outlet C. The vane resists the flow 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. Ports can be threaded or flanged. See selections in the “How to Order” section. Viton® and Kalrez are registered trademarks for DuPont Performance Elastomers.

Select appropriate symbols and build a model code number, as in example shown: EXAMPLE: SERIES BY PRESSURE RATING Normal pressure (300 PSI) Medium pressure (500 PSI) High pressure (2000 PSI) = MN = MM = MH WHERE USED Lube oil Water Specialty Lube oil Lube oil with exterior corrosion protection Water Sea water Chemicals, corrosives Oil Water, oil with exterior corrosion protection Oil Water, oil with exterior corrosion protection INTERNAL MOVING PARTS Stainless steel (300 series) Stainless steel (316 series) Titanium Monel Standard for water, oil Chemicals and corrosives Sea water Corrosives...

SERVICE Oil and dust tight (Type 12) Available on "A", "L" and "Z" only = N Weatherproof (Type 4) Available on all boxes = W Weatherproof, corrosion proof (Type 4X) Available on all boxes = X FLOW DIRECTION Left to right = R Right to left = L Up = U Down = D SPECIAL OPTIONS High-temp- 400°F for A & R Box, 300°F for transmitter options Stainless steel ID tag for customer supplied information Pin connector (See explanation for special options.) CSA enclosure / PVC window Tempered glass window Manual override (Required for field change of set point for switch) Dual spring Clearance vane for ≥...

ENGINEERING DATA Maximum fluid temperature: 200°F (95°C) Optional max. fluid temperature: 300 & 400°F (150 & 205°C) (option HT) 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) Series MM max. operating pressures: (3:1 safety factor): 500 PSI (34.48 BAR) Series MH max. operating pressures: (3:1 safety factor): 2,000 PSI (137.93 BAR) Repeatability of switches 1% of actual flow rate FLOW & PRESSURE DROP Units with max flows to 80 GPM (300 LPM) impose a pressure drop that increases with flow...

CONTROL BOX SELECTION GUIDE “A” box is selected for price and simplicity. It holds switches (general purpose and hermetically sealed) or 4-20mA transmitter. You get this control box when you order any CONTROL BOX & READOUT starting with an “A” (see "How to Order" page). Examples: A1WR is a one switch, weatherproof box with flow from left to right. This control box is made of Polysulfone (standard low cost “A”) with options for aluminum (“L”) or 316 stainless steel (“Z”). Maximum installation dimensions 6.12 [155mm] APPROX. SWING RADIUS “R” box is selected for greater resolution (more...

CONTROL BOX SELECTION GUIDE “T” box is selected for availability of two isolated junction boxes with terminal strips. This means that no direct wiring to switches or transmitters is required. Digital LCD display of flow is optional (“TXL”). It holds switches (general purpose) and 4-20mA transmitter. Switch (standard service) and transmitter are offered in this control box together when signal redundancy is desired. These are wired to separate junction boxes for signal isolation. You get this control box when you order any CONTROL BOX & READOUT starting with a “T” (see "How to Order" page)....