3
3.2 Operating Parameters*
Pressure Limits:
All 442 Seals can withstand operating pressures from full
vacuum (710 mm Hg /28") to the maximum pressures at the
conditions listed.
Small Sizes:
25 mm through 60 mm (1.000" through 2.500")
Reaction Bonded Silicon Carbide/Carbon – (3600 RPM)
up to 30 bar g/450 psig
Use 4 bolt mounting configuration for pressures above
20 bar g/300 psig
Large Sizes:
65 mm through 120 mm (2.625" through 4.750")
Reaction Bonded Silicon Carbide/Carbon – (1750 RPM)
up to 18 bar g/250 psig
Use 4 bolt mounting configuration for pressures above
14 bar g/200 psig
Speed Limits:
To 20 m/s (4000 fpm)
Temperature Limits:
To 120°C (250°F)
* Consult Chesterton Mechanical Seal Application Engineering for higher
operating conditions.
3.3 Intended Use
The mechanical seal is specifically designed for the intended
application and is to be operated within the operating
parameters as specified. For use beyond the intended
application and/or outside the operating parameters, consult
Chesterton to confirm the suitability of the mechanical seal
prior to putting the mechanical seal in operation.
3.0 DESCRIPTION cont.
3.1 Parts Identification
Figure 2
KEY
NOT SHOWN AS PART OF INSTALLED SEAL
20 – Rotary Holder Installation Spacer
21 – Rotary Holder Shipping Spacer
22 – Gland Shipping Spacer
23 – Gland Installation Tool
23
20
21
22
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