128-PQC
2
Table 1. Specifications
Available Configurations
Type 128 Actuator: Yokeless, on-off spring-and-di-
aphragm actuator with action field-reversible be-
tween
J
spring-open and
J
spring-close
Design PQC Valve: See table 2
Valve Sizes and End Connection Styles
See table 2
Maximum Inlet Pressures and Temperatures
(1)
3600 psig from –20 to 100
_
F, 3550 psig at 150
_
F,
and 3520 psig at 180
_
F (248 bar from –29 to 38
_
C,
245 bar at 66
_
C, and 243 bar at 82
_
C)
Maximum Pressure Drops
(1)
See table 3
Actuator Input Signal
0 or 20 psig (0 or 1.4 bar) or
0 or 35 psig (0 or 2.4 bar)
Maximum Actuator Casing Pressure
100 psig (6.9 bar)
Shutoff Classifications
Metal Seats: ANSI Class IV ANSI/FCI 70-2
Soft Seats: ANSI Class VI ANSI/FCI 70-2
Material Temperature Capabilities
(1)
Metal Seat: –20 to 180
_
F (–29 to 82
_
C)
Soft Seat: –20 to 150
_
F (–29 to 66
_
C)
LCC Valve Body: –50 to 180
_
F (–46 to 82
_
C)
Flow Characteristic
Quick-opening with 45-degree taper valve plug
Flow Direction
Either way
Port Diameters
See table 2
Maximum Travel
3/8-inch (10 mm)
Actuator Diaphragm Effective Area
33 inches
2
(213 cm
2
)
Actuator Pressure Connections
1/4 inch NPT female
Valve Travel Indication
Scale divisions for each 25% of travel are provided
on plastic travel indicator cover
Approximate Weight
17 lb (7.7 kg)
1. The pressure and temperature limitations in this manual, and any applicable code limitation, should not be exceeded.
Table 2. End Connections and Port Diameters
DESIGN
PQC
VALVE STYLE
Combination globe and angle valve body;
common end and bottom connections and
pipe plug allow conversion between globe
and angle styles
END CONNECTIONS
1 inch NPT female
SEATING
Metal
Soft
PORT
Inch
1/4, 3/8, 1/2
1/4, 3/8, 1/2, 3/4
(1)
PORT
DIAMETERS
mm
6.4, 9.5, 12.7
6.4, 9.5, 12.7, 19.1
(1)
C
v
AT MAX TRAVEL
FOR LARGEST PORT
WITH FLOW TENDING
TO CLOSE VALVE
8.32 (angle-style valve body)
1. Cageless construction with seat cut into valve body for soft seat only.