Instruction Manual Form 5376 May 1998
Design EZ-C, ET-C, and EWT-C
Design EZ-C, ET-C, and EWT-C Cryogenic Sliding-Stem Control Valves Contents Introduction
.............................. 1 Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation
................................ 3
Maintenance
.............................. 4 Packing Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 4 Replacing Packing . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Trim Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Design EZ-C Trim Disassembly . . . . . . . . . . . . . . . 7 Design EZ-C Trim Assembly . . . . . . . . . . . . . . . . . . 8 Design ET-C and EWT-C Trim Disassembly . . . . 9 Design ET-C and EWT-C Valve Plug Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Design ET-C and EWT-C Trim Assembly . . . . . 10 Coining Soft Metal-to-Metal Seats . . . . . . . . . . . 10
Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . Parts Kits
10
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction Scope of Manual This instruction manual includes installation, maintenance, and parts information for Design EZ-C, ET-C and EWT-C valves (see figure 1). Refer to separate manuals for instructions covering the actuator and accessories. Only personnel qualified through training or experience should install, operate, and maintain these valves. If you have any questions about these instructions, contact your Fisher Controls sales office or sales representative before proceeding.
W6370/IL
Figure 1. Typical Cryogenic Valve with Extension Bonnet and 470 Series Actuator
Description Design EZ-C: globe-style, single-port, unbalanced valves with integral end connections, post guiding, metal-to-metal seating, and quick-change trim. They feature stainless steel construction materials and fabricated extension bonnets. Designs ET-C and EWT-C: metal-to-metal seated globe-style, single-port, cage-guided, pressure-balanced valves featuring stainless steel construction materials and fabricated extension bonnets.
D102175X012
12 Bonnet Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Design EZ-C Valve Body Parts . . . . . . . . . . . . . . . 14 Design ET-C and EWT-C Valve Body Parts . . . . 18