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TARTARINI Tartarini, Emerson

Cronos Series
Pilot-Operated Pressure Reducing Regulators



The Cronos Series regulators are accurate
pilot-operated, pressure balanced, soft
seated regulators designed for high
pressure transmission/city gate stations,
large capacity distribution systems, and
power plant feeds.
They provide smooth and quiet
operation, tight shutoff and long life. The
regulator utilizes a main valve actuator,
a type PRX pressure reducing pilot with a
type SA/2 pilot supply regulator or a type
PS pressure reducing pilot.
The Cronos Series is in conformity with
the Pressure Equipment Directive PED
2014/68/UE and is classifed under
Category IV.
Available Configurations
Type C: Regulator
Type CB: Regulator + Shutoff
Type CC: Regulator + Monitor
Type CCB: Regulator + Monitor + Shutoff
Type CBS: 90° Flow Regulator + Shutoff
Type CCS: 90° Flow Regulator + Monitor
Type CCBS: 90° Flow Regulator + Monitor
+ Shutoff
All Cronos type regulators are available
with or without:
Type SR: Silencer
Type SRS: Silencer with widened outlet
A widened outlet version without built-in
silencer is also available.
Body Sizes
Cronos Series:
DN 25, 50, and 80 (NPS 1, 2, and 3)
Cronos Series with Type SRS Silencer or
Widened Outlet:
DN 25 x 100, 50 x 150, and 80 x 250
(NPS 1 x 4, 2 x 6, and 3 x 10)
End Connection Styles
PN 16, 25, 40 / CL150, CL300, and CL600
Inlet Pressure Ranges
Flange Rating PN 16 / CL150:
Allowable Pressure: Up to 20 bar

• Control Accuracy
• Versatility
• Tight Shutoff
• No Atmospheric Bleed
• High Capacity
• In Service Travel Indicator
• Silencer Options


Inlet Pressure Range: 0.2 to 20 bar
Flange Rating PN 25, 40 / CL300, CL600:
Allowable Pressure: Up to 100 bar
Inlet Pressure Range: 1 to 100 bar
Outlet Pressure Ranges
Flange Rating PN 16 / CL150:
0.01 to 16 bar
Flange Rating PN 25, 40 / CL300, CL600:
0.5 to 80 bar
Minimum Operating Differential
Flange Rating PN 16 / CL150:
0.2 bar
Flange Rating PN 25, 40 / CL300, CL600:
0.5 bar
Accuracy Class
Up to ±1%
Lock-Up Pressure Class
Up to +5%
Class of Lock-Up Pressure Zone
Up to 5%
Built-In Shutoff Valve
Independent Pneumatic Control
Manual Reset
Accuracy Group: Up to ±1%
Response Time: ≤1 s
Temperature Capabilities
Standard Version:
Working: -10° to 60°C
Low Temperature Version:
Working: -20° to 60°C
Approximate Weights
(Including Pilot)
36 to 427 kg
For full details consult the documentation available on our website:


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