Piston Inline PI
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MAX FLOW SIZES Max Liquid Pressure Max Liquid Pressure From 5 GPH to 30 GPM (20 LPH to 110 LPM) 500 PSI (34.48 Bar) or 1500 PSI (103.42 BAR) 1% FS accuracy available (1 GPM and higher) UNIVERSAL Flow Monitors ® Flow meters, Flow switches and Flow transmitters Piston - In Line NIST Traceable Calibration Certificate Available DESCRIPTION These variable-area meters position an orifice over a tapered shaft to establish flow rate. Mounting is in-line and in any position. Straight pipe runs before or after this monitor are not required. The all-mechanical sensing system directly drives the pointer, 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, HART or some combination of switches with electronic outputs (for signal redundancy). The switches can be general purpose or rated for hazardous locations (all classes, groups and divisions). PI Series, with standard scale and pointer (control box A). 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 Housings and seals are offered in a variety of materials to suit a wide range of applications, such as: water, oil, coolants, paint, solvents and some corrosive fluids. See selections in the “How to Order” section. LINE CONNECTION Ports can be threaded or flanged. See selections in the “How to Order” section. Viton® and Kalrez™ are registered trademarks for DuPont Performance Elastomers. PI 092520 Fluid flow causes a spring-loaded piston A having a circular opening at its center B to move along the axis of a precision-tapered shaft C. This creates a variable orifice in direct proportion to the flow rate. The piston is mechanically linked to the readout pointer D and actuates switch E or a transmitter (

Select appropriate symbols and build a model code number, as in example shown: EXAMPLE: PI - SERIES BY PRESSURE RATING Piston Inline HOUSING MATERIAL 500PSI Aluminum Brass HOUSING MATERIAL 1500PSI Stainless steel (316) WHERE USED Lube oil Water WHERE USED Chemicals, corrosives, oil = INTERNAL MOVING PARTS Stainless steel (316L series) Water, oil, chemicals and corrosives SEAL MATERIAL Buna N EPR Viton Kalrez Kalrez (dynamic) & Buna N (static) Kalrez (dynamic) and EPR (static) Kalrez (dynamic) and Viton (static) Kalrez (dynamic) and Teflon (static) Water, oil Hot water, caustics Acids, some...

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 (See explanations below) High-temp- 400°F (300°F for transmitter options) High accuracy (+/-1%) ref. page 4 Stainless steel ID tag Safety Glass window ref. page 4 Wall mounting bracket Foot mounting bracket SWITCH SETTING No symbol = Lowest possible setting (usually 10% of maximum flow) Desired set point is assumed to be...

ENGINEERING DATA Maximum fluid temperature: 200°F (93°C) Piston Inline (PI) meters mount in-line and are typically supported by rigid pipe. Maximum ambient temp: 150°F (65°C) CSA listed only to 105°F (41oC) For additional support when using tubing or flexible hose, order special options W (Wall) or F (Foot) mounting brackets. Series PI max. operating pressures: (3:1 safety factor): 500 PSI (34.48 BAR) or 1500 PSI (103.42 BAR) Pressure drop: 5 PSI (.35 BAR) at full scale Readout accuracy, full scale: ±2% 1% HA (high accuracy) available on 1 GPM and above. Reference Special Options below...

CONTROL BOX SELECTION GUIDE R5.72 [145 mm] APPROXIMATE SWING RADIUS Maximum installation dimensions .500-NPT CONDUIT CONNECTION (2) PLACES R7.29 [R185mm] [185 mm] APPROXIMATE SWING RADIUS Maximum installation dimensions “R” Box SECONDARY JUNCTION BOX LOCATION PRIMARY JUNCTION BOX LOCATION 1/2" NPT CONDUIT CONNECTION ROUND ENCLOSURE JUNCTION BOX OPTIONS No Junction Box Pointer Only, No Electrical Components 1 Junction Box One Type of Electrical Item Only – Primary Location 1 or 2 Switches or Transmitter, but NOT both. 2 Junction Boxes Transmitter AND 1 or 2 Switches. R8.08 [205 mm]...

CONTROL BOX SELECTION GUIDE A-Box for PI Series w Flanges Face-to-Face Dimensions With 150# R.F. Flanges (for other flanges consult factory) Port Size (Inches) “Flow Up” or “Flow Down” dimensions are the same. Scale numbers are rotated 90° to read correctly. Universal Flow Monitors, Inc. 1755 E. Nine Mile Road • P Box 249 • Hazel Park, MI 48030 .O. Tel: 248-542-9635 • Fax: 248-398-4274 www.flowmeters.com • E-mail: ufm@flowmeters.com