Data Sheet

HP Valve
D101635X012
Product Bulletin
51.2:HP
October 2014
4
Figure 1. Fisher HPD Valve Assembly (NPS 2 to 6)
W5815A-1
FLOW
Figure 2. Typical WhisperFlo Trim Cut Section View
for Fisher HP Valve
W7065
Unbalanced Trim
HPS and HPAS
These valves have an unbalanced plug and provide
excellent shutoff.
Expanded Ends
Expanded ends are available on the NPS 4 and 6 CL900
and 1500 HP valves. The NPS 4 HP valve body is offered
with NPS 6 ends. The NPS 6 valve body is offered with
NPS 8 ends. Both flanged and buttweld end valve
bodies are offered with expanded ends.
Cavitrol III, Whisper Trim
III, and WhisperFlo Cages
To eliminate cavitation damage in a properly-sized
valve, a Cavitrol III cage is available with HPS, HPAS,
HPT, and HPAT control valves.
To help attenuate aerodynamic noise in gaseous
service, Whisper Trim III and WhisperFlo (figure 2)
cages are available with HPD, HPAD, HPS, HPAS, HPT,
and HPAT control valves. Contact your Emerson
Process Management sales office for more
information.
Features
 Valve Plug Stability– Rugged cage guiding provides
increased valve plug stability, which reduces
vibration and mechanical noise.
 Full Pressure Drop Capability–Rugged construction
allows full pressure drop capability in HP series
valves.
 Spiral-Wound Gaskets for Exc ellent Sealing Under
All Service Conditions–Premium materials are used
in the construction of spiral-wound gaskets for HP
Series valves. These premium materials, which
make up the standard spiral-wound gaskets, are
N06600 (alloy 600)/graphite or N07750
(alloy X750)/graphite.
 Compliance with the Clean Air Act–Optional
ENVIRO-SEAL packing systems (figure 4) provide an
improved stem seal to help prevent the loss of
valuable process fluid or emission of hazardous
process fluid. The ENVIRO-SEAL packing systems
featurePTFEorgraphiteULF.
 Piping Economy–The availability of expanded end
connections on NPS 4 and 6 HP valves may
eliminate the need for line swages while
accommodating oversized piping arrangements.
 Quick Change Trim–Maintenance is simple and can
easily be performed u sing common tools. Trim
components can be quickly removed and changed
with no need for special tools.