3
PENBERTHY
SERIES H FLAT GLASS GAGES
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
3.1 Design ratings at maximum and minimum operating temperatures
TABLE 1
Gasket
material
Glass
size
Model RH and RHR reflex
Wetted parts material steel or stainless steel w/B7 bolting
Grafoil
®
(standard) or non-asbestos
4-9
4000 psig (27580 kPa) at -20°F (-29°C) to 100°F (38°C)
3080 psig (21240 kPa) at 600°F (316°C)
Top-chem 2000
®
4-9
3000 psig (20680 kPa) at -20°F (-29°C) to 100°F (38°C)
100 psig ( 690 kPa) at 500°F (260°C)
25% glass filled PTFE
4-9
650 psig ( 4480 kPa) at -20°F (-29°C) to 100°F (38°C)
150 psig ( 1030 kPa) at 500°F (260°C)
NBR / Buna-N
4-9
300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C)
225 psig ( 1550 kPa) at 250°F (121°C)
FKM / Viton
®
4-9
300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C)
180 psig ( 1240 kPa) at 400°F (204°C)
PTFE / Teflon
®
4-9
300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C)
150 psig ( 1030 kPa) at 500°F (260°C)
TABLE 2
Gasket
material
Glass
size
Model TH and THR transparent
Wetted parts material steel or stainless steel w/B7 bolting
Grafoil
®
(standard) or non-asbestos
4-9
3000 psig (20680 kPa) at -20°F (-29°C) to 100°F (38°C)
2310 psig (15930 kPa) at 600°F (316°C)
Top-chem 2000
®
4-9
3000 psig (20680 kPa) at -20°F (-29°C) to 100°F (38°C)
100 psig ( 690 kPa) at 500°F (260°C)
25% glass filled PTFE
4-9
650 psig ( 4480 kPa) at -20°F (-29°C) to 100°F (38°C)
150 psig ( 1030 kPa) at 500°F (260°C)
NBR / Buna-N
4-9
300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C)
225 psig ( 1550 kPa) at 250°F (121°C)
FKM / Viton
®
4-9
300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C)
180 psig ( 1240 kPa) at 400°F (204°C)
PTFE / Teflon
®
4-9
300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C)
150 psig ( 1030 kPa) at 500°F (260°C)
PCTFE/(Kel-F
®
) shields 0.063"
(1.6 mm) thick
4-9
300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C)
180 psig ( 1240 kPa) at 400°F (204°C)
TABLE 3
Gasket
material
Glass
size
Model TH and THR transparent
Stainless steel covers
Grafoil
®
(standard) or non-asbestos
4-9
1610 psig (11100 kPa) at -20°F (-29°C) to 100°F (38°C)
1040 psig (7170 kPa) at 600°F (316°C)
Top-chem 2000
®
4-9
1610 psig (11100 kPa) at -20°F (-29°C) to 100°F (38°C)
100 psig ( 690 kPa) at 500°F (260°C)
25% glass filled PTFE
4-9
650 psig ( 4480 kPa) at -20°F (-29°C) to 100°F (38°C)
150 psig ( 1030 kPa) at 500°F (260°C)
NBR / Buna-N
4-9
300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C)
225 psig ( 1550 kPa) at 250°F (121°C)
FKM / Viton
®
4-9
300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C)
180 psig ( 1240 kPa) at 400°F (204°C)
PTFE / Teflon
®
4-9
300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C)
150 psig ( 1030 kPa) at 500°F (260°C)
PCTFE/(Kel-F
®
) shields 0.063"
(1.6 mm) thick
4-9
300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C)
180 psig ( 1240 kPa) at 400°F (204°C)
Note:
lower temperatures are possible with metallic material variation. (e.g., 316 stainless
construction, Grafoil
®
gaskets/cushions useable to –325°F (-198°C)). Temperatures to
1000°F (538°C) are possible with material variation - consult factory.
The pressure and temperature ratings may deviate from the tables if the gasketing materials
of construction and/or bolting are other than those specified. Higher and/or lower temperature
ratings are available with different materials of construction.
To determine the maximum allowable working pressure for a specific temperature within the
design limits stated in the tables, the user should refer to applicable technical data sheets or,
when provided, the specifically stated design limits on a product proposal.
Note:
under no circumstances should shields be used in reflex style gages. Installation of shields
in reflex style gages will keep the liquid from coming in contact with the refractive prisms, thereby
prohibiting visualization of the liquid level in the gage.
DANGER
NEVER exceed these design ratings or application data. Exceeding design ratings or application data
may result in mechanical failure of gage components resulting in death, serious personal injury and
property damage.
NOTES
Grafoil
®
is a registered trademark of Graftech.
Top Chem 2000
®
is a registered trademark of Klinger.
PCTFE (formerly known as Kel-F
®
- a registered trademark of 3M) is manufactured by Daikin.
Viton
®
and Teflon
®
are registered trademarks of E.I. DuPont de Nemours and Company.
