Data Sheet

Bulletin 71.2:310A
2
1. The pressure/temperature limits in this bulletin or any applicable standard limitation should not be exceeded.
Specications
Available Congurations
Type 310A-32A: Type 310A main valve with one
Type 32A pilot for standard pressure-reducing and
wide-open monitoring applications
Type 310A-32A-32A: Type 310A main valve with
two Type 32A pilots for working monitor applications
Body Sizes and End Connection Styles
1-inch body with NPT ends; and 1, 2, 3, 4, or
4 x 6-inch (DN 25, 50, 80, 100, and
100 x 150) body with CL300 RF or
CL600 RF anged ends
Maximum Inlet and Pilot Supply Pressures
(1)
NPT and CL600 RF: 1500 psig (103 bar)
CL300 RF: 750 psig (51,7 bar)
Maximum Pressure Drop
(1)
NPT and CL600 RF: 1425 psig (98,3 bar)
CL300 RF: 720 psig (49,6 bar)
Maximum Outlet Pressure
(1)
Operating: 700 psig (48,3 bar)
To Avoid Internal Part Damage: 800 psig (55,2 bar)
Exceeding this pressure may result in gas venting
from pilot spring case.
Emergency (Casing): 1500 psig (103 bar) or
maximum inlet pressure whichever is lower.
Outlet Pressure Ranges and Proportional Bands
See Table 1
Maximum Travel
See Table 3
Minimum Differential Pressure
(1)
15 psig (1,0 bar)
Flow Coefcients
See Tables 4, 5, and 6
IEC Sizing Coefcients
See Table 7
Flow Capacities
See Tables 8, 9, 10, 11, and 12
Maximum Temperature Capabilities
(1)
Nitrile (NBR) with Wiper Ring:
-20° to 150°F (-29° to 66°C)
Fluorocarbon (FKM) with Wiper Ring:
0° to 150°F (-18° to 66°C)
Fluorocarbon (FKM) without Wiper Ring:
0° to 300°F (-18° to 149°C)
External Pilot Supply Connection
1/4-inch NPT
Pilot Vent Connection
1/4-inch NPT
Pressure Connections
See Figure 9
Options
• Main valve body without pilot for on-off service
• Remote-mounted pilot
• Electrically controlled pilot using Type 662 Kixcel™
• Travel indicator
• Pressure loaded pilot
• Type 252 pilot supply filter
• Backpressure protection system
• Restricted Trim (30%, 50%, or 70%)
• NACE construction
• Inlet tap
Approximate Weights
1-inch (DN 25): 45 pounds (20 kg)
2-inch (DN 50): 90 pounds (41 kg)
3-inch (DN 80): 145 pounds (66 kg)
4-inch (DN 100): 190 pounds (86 kg)
4 x 6-inch (DN 100 x 150): 235 pounds (107 kg)
Construction Materials
Main Valve
Body: WCC steel
Throttling Sleeve: Stainless steel
Seat: PTFE
Diaphragm Plates: Steel
Diaphragm and O-rings: Nitrile (NBR) (standard)
or Fluorocarbon (FKM)
Main Spring: Steel
Valve Plug: Stainless steel
Travel Indicator Rod: Stainless steel
Wiper Ring: Nitrile (NBR)
Pilot
Spring Case, Diaphragm Spacer, Pilot Body, and
Spring Case Cap: Cast steel
Adjusting Screw and Diaphragm Plate: Plated steel
Diaphragm: Nitrile (NBR) (standard) or
Fluorocarbon (FKM)
Orifice Assembly and Yoke: Stainless steel
Valve Disk Assembly: Stainless steel/Nitrile (NBR)
(standard) or Stainless steel/Fluorocarbon (FKM)
Bleed Valve and Orifice: Stainless steel
Piston and Piston Seat Assembly: Stainless steel
and Nylon (PA)
Pilot Main Spring: Plated steel