Fisher Fisher H2 Duplex High-Pressure Packing Installation Instructions Installation Instructions
Installation Instructions
D103804X012
ENVIRO-SEAL H2 Duplex High-Pressure Packing
January 2016
Fisher™ ENVIRO-SEAL™ H2 Duplex High-Pressure Packing
Use these instructions to install ENVIRO-SEAL H2 Duplex high-pressure packing in valves that have standard packing or when inspecting or replacing
ENVIRO-SEAL H2 Duplex high-pressure packing for applications up to 149_C (300_F) and 330 bar (4800 psi) on Fisher easy-e™, EH, and HP valves.
WARNING
Avoid personal injury or property damage from sudden release of process pressure or bursting of parts. Before performing any installation
operations:
D Always wear protective clothing, gloves, and eyewear.
D Do not remove the actuator from the valve while the valve is still pressurized.
D Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be sure the actuator cannot suddenly
open or close the control valve.
D Use bypass valves or completely shut off the process to isolate the control valve from process pressure. Relieve process pressure from both sides
of the control valve. Drain the process media from both sides of the valve.
D Vent the pneumatic actuator loading pressure and relieve any actuator spring precompression so the actuator is not applying force to the valve
stem; this will allow for the safe removal of the stem connector.
D Use lock‐out procedures to be sure that the above measures stay in effect while you work on the equipment.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process media.
If you are installing the system in a valve that is still connected to an actuator, remove the actuator from the valve to provide sufficient space to
install the packing assembly. If a springreturn actuator is used, it is possible that disconnecting the stem connector will allow the spring to force the
actuator to the end of its travel. Be sure the actuator spring is resting on its travel stop. Refer to the appropriate valve and actuator instruction
manuals to remove the actuator.
1. Carefully remove the old packing parts from the packing box. The surface condition of the valve stem and the packing box wall is critical in
obtaining a good seal. If the valve stem needs to be replaced, or any other valve part, refer to the appropriate valve instruction manual for
replacement procedures. Complete all valve maintenance before installing the ENVIRO-SEAL H2 Duplex high-pressure packing system into the
bonnet.
2. Install new studs (key 200) and nuts (key 212) from the retrofit kit.
Note
Ensure that the packing box parts are assembled in the correct order. Packing parts cannot function properly if the Belleville springs or other packing parts
are not stacked correctly.
3. Use figure 1 to ensure packing parts are assembled in the correct order. Install the packing parts into the packing box.
4. Install the spring pack assembly (key 217), which includes the attached springs, and packing flange (key 201), on the stem. Install the nuts (key
212) and hand-tighten them.
Note
Lubrication is required for the packing studs and nuts. Although it is important to properly lubricate the stud threads and internal nut threads, it is also
important to properly lubricate the contacting face of the nut.
5. You will obtain maximum benefit from your ENVIRO-SEAL H2 Duplex high-pressure packing system when you tighten the packing flange nuts
and compress the Belleville springs to their “target load”. The Belleville springs are designed for optimum performance when they are
compressed to 85% of their maximum deflection, or nearly flat. (Maximum deflection is when the springs are 100% compressed, or completely
flat.)
To obtain the target load of 85% compression of maximum deflection, perform the following:
D Tighten the packing flange nuts alternately and evenly, keeping the packing flange parallel with the valve flange, until the Belleville springs are
compressed 100% (or completely flat).
D Loosen each packing flange nut 1/4 turn (90_ of rotation). The “target load” of 85% compression has now been reached.
6. The “springs flat” procedure described above is the preferred method of adjusting ENVIRO-SEAL H2 Duplex high-pressure packing. However, the
torque values in table 1 can also be used as a guideline for 85% spring compression. These values are based on generous lubrication of the
packing studs and nuts with antiseize lubricant (key 213).
www.Fisher.com
ENVIRO-SEAL H2 Duplex High-Pressure Packing
January 2016
Installation Instructions
D103804X012
Other Considerations
When retrofitting an existing packing system or repacking a valve with ENVIRO-SEAL H2 Duplex high-pressure packing that has been in service,
check the condition of the packing bore after you have removed the packing. An easy method for cleaning debris and minor imperfections from the
bore is to use a brake cylinder hone attached to an electric drill. The method will do a good job of cleaning the packing bore without changing the
dimension of the bore.
If less than 20% of the surface area of the bore is pitted and if there are no pits deeper than 0.020 inch, then your packing should work as designed.
This does not need to be an exact measurement; visual inspection is adequate. If the packing bore does not meet this criterion, however, you should
replace the bonnet.
Table 1. ENVIRO-SEAL H2 Duplex High Pressure Packing Torque
STEM DIAMETER TORQUE
mm Inch N•m Lbf•in Lbf•ft
12.7
19.1
25.4
31.8
1//2
3/4
1
1-1/4
8.5
21
47
56
76
187
420
495
6.3
16
35
41
Figure 1. ENVIRO-SEAL H2 Duplex High-Pressure Packing Assembly
PACKING NUT
(KEY 212)
PACKING STUD
(KEY 200)
ANTI-EXTRUSION
WASHER
(KEY 218)
ANTI-SEIZE LUBRICANT (KEY 213)
Table 2. Fisher easy-e, EH, and HP Kits
STEM DIAMETER
mm Inch
12.7
19.1
25.4
31.8
PACKING FLANGE (KEY 201)
SPRING PACK ASSEMBLY
(KEY 217)
1/2
3/4
1
1-1/4
RETROFIT KITS
RPACKH2X012
RPACKH2X022
RPACKH2X032
RPACKH2X042
PACKING SET
(KEY 215)
GRAPHITE BUSHING GUIDE
LANTERN RING
(KEY 207)
(KEY 216)
GRAPHITE COMPOSITE
PACKING (KEY 209)
BELLEVILLE SPRING
STACKING ORDER
PACKING BOX RING
(KEY 211)
PTFE PACKING WASHER
(KEY 214)
WARNING
Use only genuine Fisher replacement parts. Components that are not supplied by Emerson Process Management should not, under any
circumstances, be used in any Fisher valve, because they may void your warranty, might adversely affect the performance of the valve, and could
cause personal injury and property damage.
Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance
of any product. Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.
Fisher, ENVIRO-SEAL, and easy-e are marks owned by one of the companies in the Emerson Process Management business unit of Emerson Electric Co.
Emerson Process Management, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property
of their respective owners.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not
to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are
governed by our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such
products at any time without notice.
Emerson Process Management
Marshalltown, Iowa 50158 USA
Sorocaba, 18087 Brazil
Cernay, 68700 France
Dubai, United Arab Emirates
Singapore 128461 Singapore
www.Fisher.com
2
E 2014, 2016 Fisher Controls International LLC. All rights reserved.
Loading...