Instruction Manual
D102013X012
8560 Valve
June 2017
5
Figure 2. Maximum Pressure/Temperature Ratings
1
NOTE:
TEMPERATURE LIMITATIONS DO NOT ACCOUNT FOR THE ADDITIONAL LIMITATIONS IMPOSED BY THE BACKUP RING USED WITH THIS SEAL. TO DETERMINE THE EFFECTIVE
TEMPERATURE LIMITATION OF THE APPROPRIATE SEAL/BACKUP RING COMBINATION, REFER TO TABLE 4.
A6306-2
Valve Orientation
When installing the valve, it is recommended that the valve drive shaft be horizontal as shown in figure 1.
Note
Due to its weight, the 1052 size 70 actuator must be externally supported when mounted in a horizontal position.
Valve Direction
The high performance butterfly valve is designed to allow flow in either direction when in the open position. When in
the closed position, high pressure should be applied to a specific side of the disc to provide best performance and
optimal valve life (see list of seal types below). See figure 3.
Applications with bi‐directional seals, such as soft or Phoenix III, under normal operating conditions can (at different
times) experience pressure in both directions; the highest of the two pressures should be exerted on the preferred side
of the disc. If the two pressures are equal, then the one lasting the longest period of time should be applied to the
preferred side.
1.
For PTFE, Reinforced PTFE, and UHMWPE seal rings:
This seal is bidirectional. For optimal performance, high
pressure should be applied to the front (retaining ring side) of the disc.
2.
For metal seal rings:
a.
NOVEX seal:
The NOVEX seal is uni‐directional. High pressure at the closed position MUST be at the back
(waterway side) of the disc.
b.
Phoenix III Seal:
This seal is bidirectional. For best performance, high pressure at the closed position should be
applied to the back (waterway side) of the disc.
c.
NPS 2 Seal:
The preferred direction of installation is with high pressure at the front (retaining ring side) of the
disc. Reverse shutoff is permissible at lower pressure (see the specifications table).