Data Sheet

8510/8510B Valve
D100066X012
Product Bulletin
51.6:edisc (EMA)
February 2013
3
ENVIRO-SEAL Packing System Specifications
Available Packing
J ENVIRO-SEAL PTFE Packing System
J ENVIRO-SEAL Graphite Packing System
Maximum Temperature/Pressure Limits
(1)
Maximum Application Temperature/Pressure Limits
to meet EPA Fugitive Emission Standard of 100
ppm
(2):
For ENVIRO - SEAL PTFE Packing Systems: Up to 232C
(450F) at the ASME class rating of the valve.
For ENVIRO
- SEAL Graphite Packing Systems: Up to
316C(600F) at the ASME c lass rating of the valve
Material Temperature Range:
For ENVIRO
- SEAL PTFE Packing Material:
-46 to 232C(-50to450F)
For ENVIRO
- SEAL Graphite Packing Material:
Up to 316C(600F)
Construction Materials
(3)
PTFE Packing S ystems:
Packing Rings: PTFE V-ring
(4)
Male and Female Adaptor Rings:Carbon-filled PTFE
V-ring
Anti
- Extrusion Rings: High strength polymer
Packing Box Rings: S 31600 (316 SST)
Graphite Packing Systems:
Packing Rings: Graphite
Anti
- Extrusion Rings: Carbon
Packing Box Rings: S 31600 (316 SST)
Spring Pack Components:
O
- Ring: Nitrile. The O-ring serves as an assembly
conveniencetoholdthespringsinpositiononthe
follower.
Packing Follower: S31600withcarbon-filled PTFE liner
Springs: N07718
Packing Flange: S31600 (316 SST)
Packing Box Studs: Strain-hardened S31600,
SA-193-B8M
Packing Box Nuts: S31600 SA-194-8M
1. The pressure/temperature limits in this bulletin and any applicable standard or code limitation for valve should not be exceeded.
2. The Environmental Protection Agency (EPA) has set a limit of 100 parts per million (ppm) for fugitive emissions from a valve.
3. For other materials of construction, see table 3.
4. In vacuum service it is not necessary to reverse the ENVIRO-SEAL PTFE packing rings.
Features (continued)
 Improved Environmental Capabilities–The optional
ENVIRO-SEALt packing systems, shown in figure 6,
are designed with very smooth stem surfaces, and
live loading provides improved sealing, guiding, and
loading force transmission. The seal of the
ENVIRO-SEAL system can control emissions to
below the EPA (Environmental Protection Agency)
limit of 100 ppm (parts per million) for valves.
 Lost Motion Minimized–For 8510, the taper pin/disc
connection and the splined valve shaft with
clamped lever and single pivot linkage reduce lost
motion between the actuator and valve. For 8510B,
the taper key/disc connection and the splined valve
shaft with clamped lever and single pivot linkage
reduce lost motion between the actuator and valve.
 Greater Capacities and Lower Operating
Torques–The contoured disc inc reases flow
capacity and reduces operating torque at peak
angles of disc opening.