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Mid-West
Instrument
Installation and Operating Instructions
INSPECTION
Before installation check nameplate on each
instrument against the receiving paperwork and the
intended application for correct part number,
materials, working pressure, dial range, etc. If
equipped with switches, check electrical rating,
type of enclosure, etc. Inspect for shipping damage.
If damaged, report it immediately.
NOTE - Before attempting repairs contact your
local Mid-West Representative or our
factory. Failure to do so will void any
warranty.
PRODUCT DESCRIPTION
The Model 130 is a differential pressure instrument
available as a switch, gauge, or both. See "Part
Numbering System", (Fig. 2).
A flexible elastomer diaphragm and calibrated
range spring are moved by differential pressure. A
®
Model 130
magnet, coupled with the diaphragm, transmits
motion through the wall of the pressure housing to
a follower magnet attached to an indicating pointer.
The rotation of the follower magnet causes the
pointer to track movement of internal magnet and
indicate differential on the dial scale.
When equipped with switches for Aluminum, Brass
or 316SS bodies only, a contact is made or broken
by the magnetic field of the internal magnet.
The diaphragm is totally supported upon reaching
full travel in either direction, providing full over-
range protection to rated working pressure.
INSTALLATION
Model 130 is calibrated and tested prior to
shipment and is ready for immediate installation.
Use of the following installation procedures should
eliminate potential damage and provide optimum
trouble-free operation.
BULLETIN NO. IM130/02
(Supersedes IM130/01)
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Summary of Contents for Mid-West 130
- Page 1 PRODUCT DESCRIPTION INSTALLATION The Model 130 is a differential pressure instrument Model 130 is calibrated and tested prior to available as a switch, gauge, or both. See “Part shipment and is ready for immediate installation.
- Page 2 Insert gauge through the panel, aligning panel Model 130 A, B, H, S, is provided with dual 1/4" mounting studs with holes in the panel. Install #8- FNPT connections top and bottom as standard.
- Page 3 MOUNTING INFORMATION & DIMENSIONAL DATA (FIG. 1) MODEL 130 - P MODEL 130 A - 130 B - 130 H - 130 S NOTES: 1. Drawings show standard gauge nominal dimensions. (not to scale) 2. Dimensions shown in parentheses are in millimeters.
- Page 4 Complete Assembly Rated Class I, Division I, Groups C & D; 9. Special (Uncoded Options) Class II, Division I, Groups E, F & G. NOTE: The use of diaphragm seals is not recommended for the model 130 series gauges. ELECTRICAL SPECIFICATIONS Attempts to install such seals will void the warranty.
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