Pura Oem & Prm Connection - Michell Instruments Pura User Manual

INSTALLATION
2.7.3 Pura OEM & PRM Connection
The Pura OEM and PRM have been assembled and packaged within a Class 100 clean-
room environment. To maintain this level of cleanliness the packaging should only be
unpackaged within the same, or cleaner, environment.
Michell Instruments recommends the use of Swagelok
containing silver plated, stainless steel ¼" VCR gaskets, when connecting the Pura into
a gas line. The distance between the inlet and outlet gas connection ports is set at a
pitch of 120 mm (4.7").
!
1. Install the sealing gasket onto the VCR connections on either the
Pura or the connecting gas lines. Ensure that the Pura is installed
into the gas line with reference to the gas flow direction and the
inlet port, as indicated on the Pura body.
2. Tighten the female nut firmly, finger tight.
3. Hold the Pura transmitter stationary with a spanner/wrench and
tighten the gas line nut 1/8 of a turn using a second spanner/
wrench.
4. Repeat this operation on the remaining gas connection port.
10
Pura Advanced Online Hygrometer User Manual
CAUTION: Over tightening the nuts can cause irrecoverable
damage to the seals and seatings.
retained gasket assemblies,
®
97074 Issue 10, December 2021