Watts 116FM - Manual

Series 116FM Globe
Body & Cover: Ductile Iron ASTM A536
Seat (Trim): Stainless Steel CF8M - Xylan Coated
Internals: Stainless Steel S30400 or Ductile Iron
ASTM A536 Fusion Bonded Epoxy
Coated
Stem: Stainless Steel S30400 - Xylan Coated
Spring: Stainless Steel AISI S30200
Elastomers: Buna-N
Control Tubing: Copper
Fittings: Brass
Pressure Relief
Control Body:
Bronze
Materials
Fire Pump Relief Valve
Features
The WATTS ACV 116FM (Globe) Relief Valve meets all require-
ments for UL listed, FM Approved fire protection service. The
design and features incorporated in the WATTS ACV Valves
assure accurate control, dependable performance, and long life.
Function
Automatically maintains a constant pressure in the fire protection
system by relieving excess pressure.
Models
Model 116FM: Globe Pattern Single Chamber Relief Valve
Operation
The WATTS ACV Model 116FM PRESSURE RELIEF VALVE
is controlled by a Pressure Relief Control. The Pressure Relief
Control is normally closed, held closed by an adjustable spring
setting to maintain a constant inlet pressure to the main valve.
When upstream pressure increases above the relief set-point,
the Relief Control throttles open, increasing flow through the
control tubing. Pressure is decreased in the main valve cover
chamber, causing the main valve to modulate towards open,
relieving excess upstream pressure. The desired system pres-
sure is maintained.
As the upstream pressure decreases below the relief set-point,
the Relief Control throttles closed, restricting flow through the
control tubing. Pressure is increased in the main valve cover
chamber, causing the main valve to modulate towards closed,
maintaining the desired upstream pressure. Should upstream
pressure drop below and remain below the set-point, the main
valve closes drip tight.
Sizes / Approvals
20 - 175 PSI Relief Service
100-300 PSI Relief Service
ANSI End Connections 150, 300, and 300 x 150
Valve Sizes Available in Angle and Globe
3” 4” 6” 8”
UL UL/FM UL/FM UL/FM
116FM Globe
ES-ACV-116FM
Technical Bulletin
Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––
Job Location ––––––––––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––––
Engineer ––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. ––––––––––––––––––––––––––––––––––
Approval ––––––––––––––––––––––––––––––––––––––––––––– Representative ––––––––––––––––––––––––––––––––––––––––
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with-
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
1 - Main Valve
2 - PV20C Relief Control
3 - Pressure Gauge
4 - Fixed Orifice
5 - Check Valve
6 - Flo-Clean Strainer
Components
3
4
1
2
5
6
CLOSES VALVE
OPENS VALVE
FLOW
Also Available:
Model 1116FM: Angle Pattern Single Chamber Relief Valve