Emerson Rosemount 304 Configuration guide
Manual Supplement
00809-0200-4816, Rev BA
2017 *00809-0200-4816*
Rosemount™304 Natural Gas Metering Manifold
Stabilized, Non-Stabilized, and Dielectric Isolator Kit Installation
Stabilized and non-stabilized connector installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1
Dielectric isolator kit installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2
1.0 Stabilized and non-stabilized connector installation
1. Verify equipment is rigid and secure to support weight of connector assemblies.
2. Remove all protection caps from the threaded connections.
3. Verify sealing surfaces and threaded connections are free of dirt, dust, or debris.
4. Wrap PTFE tape on NPT threads, ensuring start of thread is completely covered.
5. Using a 11/4-in. torque wrench, install the first connector into one of the NPT ports in the equipment
at 65 ft-lbs (90 N-m).
–For stabilized connectors, ensure the tension hex nut and the stabilizing foot are installed over
the NPT connector thread before installing into the equipment.
6. Repeat steps 4and 5to install the second connector.
7. Check the height of the outlet flanges and ensure they are aligned at the same height to allow
proper installation of the manifold. If necessary, adjust the connectors to the proper height.
8. Align the stabilizing foot (if present) to the equipment in the desired position, based on a flat or
round surface.
9. Tighten the tension hex nut over the stabilizing foot to 110 ft-lbs (150 N-m) using a 11/2-in. wrench.
10. Place PTFE gaskets in the outlet flange grooves of the connectors. Insert the four bolts with washers
into the connector holes or slots and hand tighten into manifold process flange.
Failure to install proper dielectric flange seals or O-rings may cause process leaks, which can result in
death or serious injury. Only use dielectric flange seals or O-rings designed for the specific
connector.
2
Manual Supplement
00809-0200-4816, Rev BA
Stabilized, Non-Stabilized, and Dielectric Isolator Kit Installation
2017
Stabilized, Non-Stabilized, and Dielectric Isolator Kit Installation
Note
If installing with a dielectric isolator kit, refer to section 2.0: Dielectric isolator kit installation.
11. Tighten the bolts in sequence as shown in Figure 3 using torque values provided in Table 1-1.
Figure 1. Connector Types
2.0 Dielectric isolator kit installation
1. Connectors must be installed prior to installing dielectric isolator kits.
2. Verify equipment is rigid and secure to support weight of connector assemblies.
3. Verify sealing surfaces and threaded connections are free of dirt, dust, or debris.
4. Ensure the two slots of the dielectric isolator gaskets are aligned to the bolt holes of the connector
before mounting to mating flange seal.
Stabilized Non-stabilized
A. 11/4-in. wrench flats
B. 11/2-in. tension hex nut
C. Stabilizing foot
The maximum working pressure for the Rosemount Dielectric Isolator Kit is 4500 psi (310 bar) and
maximum temperature is 150 °F (66 °C).
A
B
C
A
3
Manual Supplement
00809-0200-4816, Rev BA
Stabilized, Non-Stabilized, and Dielectric Isolator Kit Installation
2017
Stabilized, Non-Stabilized, and Dielectric Isolator Kit Installation
Figure 2. Components
5. Slip the bolt washer under the bolt head. Then slip the bolt sleeve over the bolt with the washer.
Finally slip the sleeve washer over the bolt sleeve. Repeat this for all four bolts.
6. Insert the four bolts with sleeves and washers upside down into the connector holes or slots as
shown in Figure 2, and hand tighten into manifold process flange.
7. Tighten the bolts in sequence as shown in Figure 3 using torque values provided in Table 1-1. Wait
10 minutes between the initial and final tightening of the bolts to compensate for clamp loss due to
material flow.
Figure 3. Bolt Tightening Sequence
A. 7/16–20 ⫻11/2-in. bolt
B. Bolt washer
C. Bolt sleeve
D. Sleeve washer
E. Dielectric isolator gasket
There are two different size washers provided. Failure to install both washers could result in process
leaks. The washer for the bolt sleeve has a larger inner diameter than the washer for the bolt.
4
Manual Supplement
00809-0200-4816, Rev BA
Stabilized, Non-Stabilized, and Dielectric Isolator Kit Installation
2017
Stabilized, Non-Stabilized, and Dielectric Isolator Kit Installation
Table 1-1. Torque Values for Connector Bolts
8. Check the installation for leaks after pressurizing the system. Do not exceed 4500 psi (310 bar) max
working pressure with the dielectric isolator kit. Max working pressure is limited to 3626 psi (250
bar) at or below –20 °F (–29 °C) and at or above 150 °F (66 °C).
Note
The bolt torques listed in Table 1-1 should be re-checked periodically. This is especially true if the dielectric kits are
subjected to temperatures near 150 °F (66 °C).
Bolt material Seal Initial torque Final torque
Carbon steel Dielectric gasket 22 ft-lbs (30 N-m) 28 ft-lbs (38 N-m)
Stainless steel Dielectric gasket 22 ft-lbs (30 N-m) 22 ft-lbs (30 N-m)
Carbon steel PTFE O-ring 25 ft-lbs (34 N-m) 54 ft-lbs (73 N-m)
Stainless steel PTFE O-ring 13 ft-lbs (17 N-m) 25 ft-lbs (34 N-m)
5
Manual Supplement
00809-0200-4816, Rev BA
Stabilized, Non-Stabilized, and Dielectric Isolator Kit Installation
2017
Stabilized, Non-Stabilized, and Dielectric Isolator Kit Installation
Manual Supplement
00809-0200-4816, Rev BA
2017
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