4660 Pressure Pilot
Instruction Manual
Form 5200
September 2004
2
Table 1. Specifications
Available Configurations
High-low, low-only, or high-only set point
capability
Input Signal
Type: Process pressure sensed with Bourdon
tube
Bourdon Tube Ratings: See table 2 or 3
Overpressure Protection: Maximum allowable
emergency process pressures and maximum
allowable process pressures to ensure set point
readjustability are shown in table 4
Output Signal
Zero or full supply pressure (automatically resets)
Supply Pressure
(1,4)
1.4 to 4.4 bar (20 to 65 psig)
Steady-State Air Consumption
Output Signal at Zero:
≤
0.134 normal m
3
/hr
≤
(5 scfh)
Output Signal at Full Supply Pressure:
≤
0.00134 normal m
3
/hr
≤
(0.05 scfh)
Set Point Adjustments
Continuously adjustable between 3 and 97% of
Bourdon tube rating; see table 2 or 3 for ranges
Performance in Percentage of Bourdon Tube
Rating
Repeatability
≤
0.25%
Set Point
D
P
min
Single High-Low Unit: 10% for up to 172.4 bar
(2500 psig) Bourdon tubes; 15% for 344.8 and
517.1 bar (5000 and 7500 psig) Bourdon tubes
Low-Only and High-Only Pair: 3%
Trip-to-Reset Zone (see table 2 or 3)
≤
1.5%
Exhaust Capacity
C
g
≥
15
Pilot Supply Flow Requirement
(2)
Pilot requires minimum of 4.02 normal m
3
/hr
(150 scfh) to activate relay
Operating Conditions
(1,4)
Condition
Normal Operating
Limits
Nominal
Reference
Nitrile Elastomers:
- 40 to 60
_
C
( - 40 to 140
_
F)
Ambient temperature
Fluoroelastomer
Elastomers:
- 7 to 71
_
C
(20 to 160
_
F)
21
_
C (70
_
F)
Fluorosilicone Elastomers:
(Low Temperature
Version)
- 59 to 71
_
C
( - 75 to 160
_
F)
Process temperature
- 29 to 93
_
C
( - 20 to 200
_
F)
21
_
C (70
_
F)
Operating Influences
on Switch Point
Sensitivity
Supply Pressure:
≤
0.05% of Bourdon tube rating
for a 10% change in supply pressure
Ambient Temperature:
≤
1.5% (standard
construction) or
≤
2% (low temperature
construction) of Bourdon tube rating throughout
normal operating limits with nominal reference
Time:
≤
1% of Bourdon tube rating over 30 days
at ambient temperature nominal reference
Process Pressure: Range shift or set point drift
can occur if process pressure exceeds Bourdon
tube rating
Pressure Connections
0.25 inch NPT female
Mounting
Panel, rack, pipestand, or actuator
Hazardous Area Classification
Complies with the requirements of ATEX Group II
Category 2 Gas and Dust
Approximate Weight
2.3 kg (5 pounds)
Options
J
Visual output indication,
J
flouroelastomers in
relay,
J
low-temperature version to - 59
_
C
( - 75
_
F)
J
316 stainless steel panel mounting
flange
J
set point indication, or
J
tamper-resistant front cover
1. This term is defined in ISA Standard S51.1
2. Normal m
3
/hr—normal cubic meters per hour (0
_
C and 1.01325 bar absolute). Scfh—standard cubic feet per hour (60
_
F and 14.7 psia).
3. Supply pressure at 2.4 bar (35 psig)
4. The pressure and temperature limits in this manual and any applicable standard or code limitation should not be exceeded.
