KEL Liquid Differential Pressure Flow Meters From Kobold Instruments

Differential Pressure Flow Meters The KEL Liquid Differential Pressure Flow Meters is designed specifically for applications in difficult environments. Metal housings, insensitivity to magnetic fields, and the ability to withstand large overpressures without damage, combine to make the KEL a tough performer. Designed with the industrial user in mind, the KEL Differential Pressure Flow Meters are easy to use, to read and to maintain.

Easy to Use

The KEL’s design addresses three key usage issues:

  1. To protect the sensing mechanism, the pressure diaphragm’s deflection is stopped by contact with the body of the sensor housing. This means that the membrane is not subject to mechanical damage during overpressure events such as surges or “water hammer.” Aside from inlet/outlet requirements, location of meter installation is not an issue from a mechanical standpoint.

  2. The brass and brass-cast iron KEL meters feature an orifice mechanism which does not require recalibration after replacement. Repairs or scale changes can be made easily by the user in the field. There is no need to return the meter to the factory.

  3. On a KEL with switches, actuation occurs through direct contact with the pressure diaphragm’s mechanical linkage. This reliance on direct contact, rather than magnetic coupling, makes the KEL ideal in applications which normally cause magnet failure due to the presence of large electro-magnetic fields.

Easy to Read

All KEL Differential Pressure Flow Meters come with either 5:1 or 2:1 max:min flow turndown. The 5:1 meters are typically be used in wide range metering applications. The 2:1 units are used in process monitoring situations, or in any installation requiring reduced pressure loss (see flow vs. pressure loss table.) This specialization offers superior scale resolution to a one-size-fits-all approach.

To make the flow easy to read, the KEL Differential Pressure Flow Meters have a large 4½” dial face with the measurement units evenly spaced on it’s perimeter. This even spacing is possible since the meter movement is linear with flow. The internal mechanism that linearizes the flow also dampens out needle vibration, making it possible to truly read the flow rate, rather than guess at it.

Easy to Maintain

The orifice portion of the KEL Differential Pressure Flow Meters are connected to the pressure sensing section via ducts bored into the meter casing. Since the KEL requires no pulsation snubbers because of its built-in damping, these ducts are made large enough for easy cleaning. The larger ducts make the KEL less sensitive to fouling in the first place.

With costly downtime in mind, the brass and brass-cast iron wafer-style KELs allow the pressure sensing portion of the meter to be isolated from the orifice portion while the system is pressurized. This eliminates the need to interrupt the user’s process. An isolation mechanism makes sure that no valuable operating time need be lost to perform unscheduled sensor maintenance.

Special Features:

  • Rugged metal construction

  • Flow rate to 2000 GPM

  • Linear scale

  • For horizontal or vertical pipes

  • Threaded or wafer-style fittings

  • Able to withstand high pressure surges

  • Easy to maintain

  • Ranges can be modified in the field

  • Optional alarms and 4-20 mA output

  • Metric ranges & BSP threads available

Product Specifications:

Accuracy: ±5% of full scale
Maximum Pressure: 230 PSIG
Fluid Temperature Range
No Switch: -4°F to 250°F
with Viton Seals: -4°F to 350°F
With Switches
Standard: -4°F to 200°F
High Temp: -4°F to 250°F
Electrical Protection: NEMA 3R
Optional: NEMA 4

Additional Product Info
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