MARCH, 2022
HD 235
PAGE 11 OF 16
HD FIRE PROTECT
PVT. LTD.
FLANGE X FLANGE
FLANGE X FLANGE
GROOVE X GROOVE
GROOVE X GROOVE
SCHEMATIC FOR BASIC WET PILOT TRIM FOR DELUGE VALVE
MODEL - H3 FOR HORIZONTAL MOUNTING
SCHEMATIC FOR BASIC DRY PILOT TRIM FOR DELUGE VALVE
MODEL - H3 FOR HORIZONTAL MOUNTING
SCHEMATIC 9
SCHEMATIC 10
ABBREVIATION & SYMBOLS
DV
DELUGE VALVE
G
SPRINKLER ALARM (WMG)
NRV WITH RESTRICTION HEX NIPPLE
M
EMERGENCY RELEASE STATION
PG
PRESSURE GAUGE
VALVE
RN
RESTRICTIOIN NOZZLE (AIR LINE)
OD
OPEN DRAIN
STRAINER
SV
SOLENOID VALVE
DPA
DRY PILOT ACTUATOR
---
BY USER
PS1
LOW AIR ALARM PRESSURE SWITCH
NRV
NON RETURN VALVE
PS2
WATER FLOW PRESSURE ALARM SWITCH
**
OPTIONAL
INLET
PG
OUTLET
PG
OD
M
OD
DV
~
~
TO DETECTION
LINE
SV
**
PS2
**
INLET
PG
OUTLET
PG
OD
M
OD
DV
~
~
TO DETECTION
LINE
SV
**
PS2
**
INLET
PG
OUTLET
TO DETECTION
PG
LINE
PG
AIR SUPPLY
OD
RN
DPA
M
OD
DV
~
OD
~
NRV
PS1
**
SV
**
PS2
**
INLET
PG
OUTLET
TO DETECTION
PG
LINE
PG
AIR SUPPLY
OD
RN
DPA
M
OD
DV
~
OD
~
NRV
PS1
**
SV
**
PS2
**
ET-W
ET-D