Introduction; Principle Of Operation; Pre-Installation Storage; Mounting - Bray 5A Series Installation, Operation And Maintenance Manual

5. Introduction

The Bray Series 5A and 5B Valve Status Monitors
(VSM) provide visual and electrical indication of
position of any VDI/VDE 3845 compliant quarter-
turn device.

6. Principle of Operation

Bray Series 5A and 5B VSMs are comprised of a
NEMA Type 4/4X housing with external position
indicator and two conduit entries, cam shaft with
self-locking cams, elevated terminal block, internal
grounding screw, and mounting bracket.
The VSM is coupled to the quarter turn device via
the indicator shaft. Rotation of the indicator shaft,
in turn, drives the cams and activates the switch.
The angular position in which the switches activate
can be adjusted through the self-locking cams.
Mechanical or proximity activation of switches
provides electrical feedback of achieved position
through field wiring to a control network.

7. Pre-Installation Storage

Bray Series 5A and 5B VSMs are not weatherproof
until properly installed on the quarter-turn device
or prepared for storage. Bray cannot accept
responsibility for deterioration caused on-site once
the cover is removed.
Units are shipped with two screw-in plugs to
prevent foreign matter from entering the unit.
To prevent condensation from forming inside
these units, maintain a near constant external
temperature and store in a well-ventilated, clean,
dry room away from vibration.
Store units on a shelf or wooden pallet in order
to protect against dampness.
Keep units covered to protect against dust and dirt.
Storage temperature should be maintained
between -25°C and 65°C
NOTICE
Series 5A and Series 5B Valve Status Monitor
Installation, Operation and Maintenance Manual

8. Mounting

All Bray Series 5A and 5B VSMs are suitable for
mounting to VDI/VDE 3845 compliant quarter-
turn devices using standard mounting hardware.
With proper mounting hardware, VSMs can be
installed onto other quarter-turn devices. Mounting
instructions may vary when using alternative
mounting hardware.

8.1 Adjustable Bracket

Bray's 3 piece adjustable bracket is designed to
mount on both NAMUR 30x80 and 30x130 patterns.
Installation is as follows:
1. Disassemble two mounting bracket foot
plates from top plate.
a. Continue to Step 6 if the mounting
bracket top plate was pre-installed.
2. Lightly coat mounting bracket bolt threads
with grease.
3. Place lock washer onto bolts.
4. Place nylon washer in between mounting
bracket and bottom of the VSM.
5. Attach mounting bracket and nylon washers
to the VSM using mounting bracket bolts.
a. Tighten mounting bolts in a cross
pattern to 70.8 in-lbs. [8Nm]
b. Ensure that the bracket remains aligned
with the body of the VSM.
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