KDG/KDF - Flow Meter and Flow Switch
- Details
- Published: Tuesday, 31 July 2012 11:04
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FEATURES
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GENERAL DESCRIPTION
The KDG/KDF micro flowmeters operate on the float principle and are designed to measure low gas and liquid flows. Flow can be set exactly within the measuring range using the integral precision metering valve. The contrasting color background of the scale permits accurate data readings. Additionally, 1 or 2 adjustable switches may be mounted to identify certain flow conditions. A panel mounting kit is available as an option.
Options
1. Limit Switches
All meter ranges which have a stainless steel float can be fitted with optional, adjustable switches. Two types are available:
Monostable: Switch activates momentarily as the stainless steel float passes by on rising flow.
Bistable: Switch stays activated until the float falls past the switch on decreasing flow.
Switch Specifications
Output Type: NAMUR per DIN 19234 (use EX-3001 or EX-3002 as isolation relay, sold separately)
2. Junction Box
A junction box is available for flowmeters with switches. The Junction-box contains a terminal block to facilitate making wiring connections. Flowmeters with switches which do not have a junction box will have wiring connections made via wire-leads fed through the bottom of the meter body.
3. Constant Flow Controllers
Two types of constant flow controllers are available. Types RE and NRE upstream pressure controllers. They hold flowrate constant when there is a varying downstream pressure and constant upstream pressure. All regulators are available in nickel-plated steel or brass.
4. Panel Mounting Kit
All flowmeters are available with an attached panel mounting plate and mounting hardware. The mounting plate is made of anodized Aluminum. The panel cut-out required to accommodate the panel mounting plate is 3.15” x 1.57” (80mm X 40 mm).
5. Custom Scales
Custom, direct reading scales are available for the KDG and KDF series. The custom scales allow for a direct reading, calibrated for specific gravity, viscosity operating
pressure or temperature. Any desired measuring units are possible.
SPECIFICATIONS
| Accuracy: ±2.5% full scale Repeatability: ±0.6% full scale Connection: NPT 1/4 Mounting position: Vertically, media flow from bottom to top. Max. Pressure Brass or SS Fitting: 145 PSIG PVDF Fitting: 85 PSIG |
Max. Temperature: 210°F Fittings: brass, 316-Ti SS, or PVDF Measuring cone: Borosilicate glass with yellow background Float stop: PVDF Gaskets: Viton, or Chemraz Valve: 316-Ti SS Contact: (optional) bistable or monostable proximity switch for units with SS floats. |
ORDERING INFORMATION
DIMENSIONS
Bi-stable Switch Operation
Contacts are bistable ring initiators, with 2 initiators located one above the other in one housing. This pairing permits identification of the direction of movement of the float. The ring initiator thus provides bistable switch function based on the position of the float, whether above or below the initiator block. The direction of action can be reversed by turning the ring initiators around (change over top and bottom). One transistor relay (order no. Ex 3011) is required for each circuit (double version not available).
Contacts are bistable ring initiators, with 2 initiators located one above the other in one housing. This pairing permits identification of the direction of movement of the float. The ring initiator thus provides bistable switch function based on the position of the float, whether above or below the initiator block. The direction of action can be reversed by turning the ring initiators around (change over top and bottom). One transistor relay (order no. Ex 3011) is required for each circuit (double version not available).
Connection Diagram
