Table of Contents
Advertisement
Instruction Manual
D200163X012
Table 4. Maximum Allowable Process Pressure
BOURDON TUBE RATING
(2)
Bar
6.9
17.2
34.5
69.0
103.4
172.4
344.8
517.2
689.5
6.9
17.2
34.5
69.0
103.4
172.4
344.8
517.2
689.5
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 NACE compliant Bourdon tubes are for a 2% deviation from set point due to overpressure.
Installation
If using natural gas as the pneumatic supply medium, natural gas will be used in the pressure connections of the unit
to any connected equipment. The unit will vent natural gas into the surrounding atmosphere, unless it is remote
vented.
WARNING
To avoid personal injury or property damage caused by a sudden release of pressure:
D Always wear protective clothing, gloves, and eyewear when performing any installation operations.
D Personal injury or property damage may result from fire or explosion if natural gas is used as the supply medium and
appropriate preventative measures are not taken. Preventative measures may include, but are not limited to, one or
more of the following: Remote venting of the unit, re‐evaluating the hazardous area classification, ensuring adequate
ventilation, and the removal of any ignition sources. For information on remote venting of the 4660 pressure pilot,
refer to page 9.
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 ‐DP
For a two‐segment flow line configuration that adheres to API Specification RP14C, connect as shown in example B
or C.
(1)
Stainless Steel Bourdon Tubes
(2)
Psig
Bar
100
13.8
250
34.2
500
69.0
1000
138.0
1500
206.8
2500
344.8
5000
517.2
7500
646.3
10,000
N/A
Maximum Allowable Process Pressure to Insure Set Point Readjustability
100
13.8
250
34.8
500
51.7
1000
103.5
1500
155.1
2500
172.4
5000
517.2
7500
646.3
10,000
N/A
values in tables 2 and 3 connect the pilots as shown in examples A and D in figure 2.
MIN
MAXIMUM ALLOWABLE EMERGENCY PROCESS PRESSURE
Psig
200
500
1000
2000
3000
5000
7500
9375
N/A
200
500
750
1500
2250
2500
7500
9375
N/A
4660 Pressure Pilot
May 2014
NACE Compliant Bourdon Tubes
(2)
Bar
Psig
13.8
200
34.2
500
69.0
1000
138.0
2000
206.8
3000
258.6
3750
430.9
6250
568.8
8250
758.5
11,000
(3)
13.8
200
22.3
325
53.4
775
89.7
1300
124.0
1800
227.5
3300
344.8
5000
517.2
7500
689.5
10,000
5
Advertisement
Table of Contents
