4660 Pressure Pilot
Instruction Manual
Form 5200
September 2004
4
Table 4. Maximum Allowable Process Pressure
(1)
BOURDON TUBE RATING
MAXIMUM ALLOWABLE EMERGENCY PROCESS PRESSURE
BOURDON TUBE RATING
Stainless Steel Bourdon Tubes
N05500 (K-Monel) Bourdon Tubes (NACE)
Bar
Psig
Bar
Psig
Bar
Psig
6.9
17.2
34.5
69.0
100
250
500
1000
13.8
34.2
69.0
138.0
200
500
1000
2000
13.8
34.2
69.0
138.0
200
500
1000
2000
103.4
172.4
344.8
517.2
689.5
1500
2500
5000
7500
10,000
206.8
344.8
517.2
646.3
N/A
3000
5000
7500
9375
N/A
206.8
258.6
430.9
568.8
758.5
3000
3750
6250
8250
11,000
MAXIMUM ALLOWABLE PROCESS PRESSURE TO INSURE SET POINT READJUSTABILITY
(3)
6.9
17.2
34.5
69.0
100
250
500
1000
13.8
34.8
51.7
103.5
200
500
750
1500
13.8
22.3
53.4
89.7
200
325
775
1300
103.4
172.4
344.8
517.2
689.5
1500
2500
5000
7500
10,000
155.1
172.4
517.2
646.3
N/A
2250
2500
7500
9375
N/A
124.0
227.5
344.8
517.2
689.5
1800
3300
5000
7500
10,000
1. Normal operating process pressures should not exceed the Bourdon tube rating.
2. Ratings indicated on Bourdon tube are in psig and kPa (1 bar = 100 kPa).
3. Values listed for the N05500 Bourdon tubes are for a 2% deviation from set point due to overpressure.
Note
Fisher does not assume responsibility
for the selection, use, and
maintenance of any product.
Responsibility for the selection, use,
and maintenance of any Fisher
product remains solely with the
purchaser and end-user.
Installation
WARNING
To avoid personal injury or property
damage caused by a sudden release of
pressure:
D
Always wear protective clothing
and eyewear when performing any
installation operations.
D
Do not exceed the process
pressure values in table 4 or the
maximum supply pressure values in
table 1.
D
If installing into an existing
application, also refer to the WARNING
at the beginning of the Maintenance
section in this instruction manual.
D
Check with your process or safety
engineer for any additional measures
that must be taken to protect against
process media
The following instructions describe various mounting
and connecting procedures. Pilots may be
connected together to accommodate requirements
for single and dual outputs as well as single and dual
process pressure lines. Figure 2 shows some typical
connections. When a pair of high-only and low-only
pilots are used to obtain closer set points as
specified by the set point -
D
P
MIN
and 3 and , connect the pilots as shown in examples
A and D in figure 2. For a two-segment flow line
configuration that adheres to API Specification
RP14C, connect as shown in example B or C.
Mounting
Normal installation is with the pilot mounted vertically
and with process, supply, and output connections
facing downward as shown in figure 1. If the pilot
was not ordered as part of a control valve assembly,
it can be mounted in any of the following ways. All
key numbers are shown in figure 8 unless otherwise
indicated.
