12
TM
A
PILOT
PS/79
Type 971
Introduction
The type 971 regulators feature simple
seat and counterbalanced valve.
The “top entry” design allows easy
maintenance operations without
disassembling the regulator from the line.
They assure high accuracy of the
regulated pressure even when the inlet
pressure is extremely variable.
The 971 type is in conformity with the
Pressure Equipment Directive PED 97/23/EC
and is classified under Category III.
Available Configurations
Type 971:
Regulator
Type 971-E:
Monitor
The type 971 regulator is available with
type SR silencer.
Body Size
DN 250 (NPS 10)
End Connection Styles
CL300, CL600
Inlet Pressure Ranges
Allowable Pressure: Up to 100 bar
Inlet Pressure Range: 1 to 100 bar
Outlet Pressure Range
0.5 to 70 bar
MinimumOperating Differential
Pressure
0.5 bar
Accuracy Class
Up to ±1%
Lock-Up Pressure Class
Up to +5%
Class of Lock-Up Pressure Zone
Up to 5%
• Accuracy Maintained with
Variable Inlet Pressure
• Easy Set‑point Adjustment
• High Versatility for
Different Applications
Features
Temperature Capabilities
Standard Version:
Working: -10° to 60°C
Low Temperature Version:
Working: -20° to 60°C
Approximate Weight
(Including Pilot)
1700 kg
For full details consult the documenta-
tion available on our website:
A
DOWNSTREAM OR TO A SAFE AREA
INLET PRESSURE
OUTLET PRESSURE
LOADING PRESSURE
LEGEND
Type 971
Pilot-Operated Pressure Reducing Regulators
Type 971 OPERATIONAL SCHEMATIC
