特征 Features
Product Bulletin
51.1:easy-e Cryogenic
August 2012
Features
Cryogenic Spring-Loaded Seal Ring—The seal ring
and associated valve parts in the ET-C and EWT-C
valves are specifically designed and manufactured
for excellent performance at low temperatures.
Stable Control—Rugged cage guiding in the ET-C
and EWT-C valves stabilizes the valve plug at all
points in its travel to reduce vibration, mechanical
noise, and the need for hydraulic snubbers.
Cost Effective Operation and Economical
Maintenance—Increased wear resistance of
hardened stainless steel trim means long-lasting
service. Balanced valve plug construction in the
ET-C and EWT-C valves permits use of smaller,
lower-cost Fisher actuators.
Piping Economy—Expanded end connections of EW
Series valves may reduce the need for line swages
while accommodating oversized piping
arrangements used to limit fluid flow velocities.
Cryogenic Design Features—The stainless steel valve
body and bonnet with fabricated extension are
designed to meet low temperature requirements.
The unique metal-to-metal seat design provides
repeatable tight shutoff, reducing maintenance
costs.
Contents
Features .. 2
Specifications .0 3
Tables
ET-C and EWT-C Typical Trim Materials .......... 5
EZ-C Typical Combinations of Metal Trim Parts ... 5
Maximum Allowable Actuator Thrust
easy-e Cryogenic Valves
D102189X012
Rugged Metal Seat—The metal-to-metal seat is
designed and manufactured to provide long-lasting,
reliable, tight shutoff at both ambient and
cryogenic temperatures without the need for
periodic lapping. This reduces the need for soft
seats, even in applications with stringent shutoff
requirements.
Fugitive Emission Protection—The optional
ENVIRO-SEAL™ packing systems provide an
improved stem seal to help prevent the loss of
valuable or hazardous process fluids, and keep
emissions below the EPA limit of 100 ppm.
Additionally, these live-loaded packing systems can
provide long life and reliability at low temperatures
to help reduce maintenance costs and downtime.
Thoroughly Tested—Extensive cryogenic testing
during the development of the valve design reduces
the need for expensive cold testing for most
applications, which results in quicker delivery and
greater value.
Easy Maintenance—Quick-change trim, with a
clamped-in seat ring, reduces the disassembly/
assembly time. The valve body can stay in the
pipeline during removal of trim parts for inspection
or maintenance.
Sour Service Capability—For NACE applications,
consult your Emerson Process Management sales
office.
ET-Cand EWT-C Port Diameters,
Valve Plug Travel, Stem and Yoke Diameters ... 8
EZ-C Port Diameters, Travel, Valve Plug and Stem
andYoke Diameters ....................... 8
Bolting Materials .. 8
EZ-CMaximum Allowable Pressure Drop ......... 9
Dimensions .0 10
