Ashcroft F5509, Инструкция по установке и техническому обслуживанию

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6 Construction and function
6.1 Overview
1. Sensing diaphragm
2. Sealing / spring bellows
3. Connecting rod
4. Pointer mechanism
6.2 Description of function
The pressures to be compared, differential pressure, act on a flexible stainless steel diaphragm, which separates the
two pressure champers.
The diaphragm is mechanically linked by a rigid connecting rod. When pressures are equal on both sides, the
diaphragm is on zero position. When there is a difference in pressures the diaphragm is deflected from the high
pressure side, towards the lower pressure side, causing a displacement of the connecting rod.
A precision mechanism translates the linear displacement of the diaphragm connecting rod to angular movement of
the gauge's dial pointer. The pointer's displacement range of 270° corresponds to the full scale differential pressure.
6.3 Description of components
6.3.1 Scale with pointer
The differential pressure gauge is equipped with a dial face and pointer pursuant to DIN 16003, nominal size 100 mm
or 160 mm.
6.3.2 Instrument connection
The instrument connection is located on the underside of the differential pressure gauge and can be male or female
threaded process connection. Distance between ports is 37 mm, please consider this when selecting a 5-way
manifold.
6.3.3 Vent valve
The vent valve for the housing is located on the top side. If the nipple is pulled out, the housing is vented and the
pressure which has built up in the housing due to the influence of temperature is discharged. With the valve closed,
protection class IP 66 is achieved.
6.3.4 Rear wall/plug with blow-out capability
The pressure gauge has a plug capable of blowing out on the rear wall of the housing (Model F5509) or a rear wall
capable of blowing out (Model F6509). These act as a safety feature pursuant to DIN 16003 and simultaneously allow
for temperature compensation for the housing, via a rubber membrane.
6.4 Accessories
Please contact the manufacturer regarding available accessories.
7 Transport
7.1 Safety
The differential pressure gauge should be protected against the effects of knocks and impacts. The device should only
be transported in the packaging provided, to protect against glass breakage. The device should only be transported in
a clean condition (free of residues of measuring media).
7.2 Transport inspection
The delivery must be checked for damage during transport. In the event of damage during transport, the delivery must
not be accepted, or only accepted subject to reservation of the scope of the damage being recorded and, if necessary,
a complaint initiated.