Gas Pressure Governors - P1: 400÷500

ST846-F e ST846-F/SF

P1 : 400 ÷ 500 mbar - P2 : 16 ÷ 60 mbar

CODE	ATTACCHI	Q min	Q max
ST846-15-F	DN15 (G 1/2” FF)	1 m³/h	10 m³/h
ST846-20-F	DN20 (G 3/4” FF)	1,1 m³/h	11 m³/h
ST846-25-F	DN25 (G 1” FF)	1,2 m³/h	12 m³/h

COMPONENTS
1. Plastic cup
2. Regulation spring
3. Cover
4. Diaphragm
5. O-ring
6. Obturator
7. Bottom cover
8. Obturator pin
9. Filtering organ
10. Operating diaphragm
11. Diaphragm plate
12. Diaphragm fi xing nut
13. Setting screw

TECHNICAL FEATURES
Model: F and F/SF
Spring Code: 847/1
P1: 60 ÷ 100 mbar
P2: 13,7 ÷ 30 mbar
Q min: see performances graph
Q max: see performances graph
Ref. Standard: EN 88-1
Type of gas: I°, II° and III° family
Class: A
Group: 2
Ambient Temp.: -15°C ÷ +60°C
Connections: EN ISO 228 - G1/2", G3/4"
Certificate CE No. 51BS3443

DESCRIPTION
Gas pressure governor series ST 846-A DN 15 - DN 20 - DN 25
This device, due to its accuracy regulation, it is particulary suitable for small systems and where the gas is distributed in a not uniform manner.

ATTENTION!!! THE FOLLOWING OPERATIONS SHOULD BE DONE BY TECHNICAL SPECIALIST.

INSTALLATION
The Governor is normally placed before the gas meter. It should be installed having the arrow (printed on the governor body) pointing toward gas meter and in vertical position. Close to the outlet connection there is a pressure point (as per UNI 8978) where it is possible to verify the regulated outlet pressure.

CALIBRATION
Before starting the installation, make sure the supplied spring is adjusted to the desired set pressure. After removing the plastic cap (1), place the pressure regulator (13) to the minimum setting (fully unscrewed). Then start the system, controlling the pressure adjustment screw on the regulator itself until the desired pressure.

OUT OF ORDER
Unscrew the cap (1) and turn the setting screw (13) until its limit.

CAPACITY’S COMPARATIVE SCALE