Cl a s s i C se r i e s
P/L
X
X
X
X
1
Y/FC
2
CLOSES VALVE
OPENS VALVE
FLOW
3
4
3
(AOS)
Schematics
PRESSURE REDUCING CONTROL VALVE
w i t h HYDRAULIC CHECK FEATURE
06/08
F115-3 (Globe)
F1115-3 (Angle)
Throttles to reduce high upstream pressure to •
constant lower downstream pressure
Hydraulic Check Feature prevents ow reversal•
Reducing set-point is adjustable•
Standard Components
1 – Main Valve (Single Chamber)
2 – Pressure Reducing Control
3 – Check Valve
4 – Fixed Orice
Options & Accessories
X – Isolation Cocks ○
FC – Flo-Clean Strainer ○
Y – Y-Strainer (Replaces Flo-Clean) ○
ACS – Adjustable Closing Speed ○
(Replaces Fixed Orice)
AOS – Adjustable Opening Speed ○
P – Position Indicator ○
L – Limit Switch ○
(2)
(1)
(3)
(3)
(1)
Standard 3” & Smaller
(2)
Standard 4” & Larger
(3)
Optional All Sizes
(2)
(3)
(1)
Operations
The Watts ACV Combination Pressure Reducing and Check Valve is designed to automatically reduce a
uctuating higher upstream pressure to a constant lower downstream pressure, and close drip-tight when
downstream pressure becomes greater than upstream pressure.
It is controlled by a normally open, pressure reducing pilot designed to: 1) Open (allowing uid out of the
main valve cover chamber) when downstream pressure is below the adjustable setpoint, and 2) Close
(allowing uid to ll the main valve cover chamber) when downstream pressure is above the adjustable
setpoint. A decrease in downstream pressure causes the valve to modulate toward an open position, raising
downstream pressure. An increase in downstream pressure causes the valve to modulate toward a closed
position, lowering downstream pressure.
If downstream pressure becomes greater than upstream pressure, downstream pressure is admitted to the
main valve cover chamber, closing the valve and preventing reversal of ow. Normal pressure reducing
operation resumes when upstream pressure exceeds downstream pressure.
8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
Cl a s s i C se r i e s
L
M
D
A
B
C
E
F
G
H
I
J
K
F115-3 (Globe)
F1115-3 (Angle)
Materials
Globe
Angle
Body & Cover: Ductile Iron ASTM A536
Coating: NSF Listed Fusion
Bonded Epoxy Lined
and Coated
Trim: 316 Stainless Steel (1-1/4” – 8”)
ASTM B62 Bronze (10”)
(Stainless Steel Optional)
Elastomers: Buna-N (standard)
EPDM (optional)
Viton (optional)
Stem, Nut & Stainless Steel
Spring:
Operating Pressure Operating Temperature Pilot System Tubing & Fittings
Threaded = 400 psi
150 Flanged = 250 psi
300 Flanged = 400 psi
Buna-N: 160°F Maximum
EPDM: 300°F Maximum
Viton: 250°F Maximum
Reducing Control Copper / Brass (Standard)
20-175 psi (Standard) Stainless Steel (Optional)
0-30 psi (Optional)
100-300 psi (Optional)
Dimensions
A B C D E F G H I J K L M
VALVE
GLOBE
SIZE
THRD.
1-1/4 7-1/4 - - 3-1/2 3-1/4 - - 1-7/8 - - 1/4 1/2 1/8 15
1-1/2 7-1/4 8-1/2 9 3-1/2 3-1/4 4 - 1-7/8 4 - 1/4 1/2 1/8 15
2 9-3/8 9-3/8 10 4-15/16 4 4 4-1/4 4 4 4-1/4 1/2 1/2 1/4 35
2-1/2 11 11 11-5/8 7 5-1/2 5-1/2 5-13/16 4 4 4-5/16 1/2 1/2 3/8 65
3 10-1/2 12 13-1/4 7 5-1/4 5-3/4 6-1/8 5-1/4 5-3/4 6-1/8 1/2 1/2 3/8 95
4 - 15 15-5/8 8-5/8 - 6-3/4 7-1/8 - 6-3/4 7-1/8 1/2 1/2 3/8 190
6 - 20 21 11-3/4 - 8-1/2 8-7/8 - 8-1/2 8-7/8 1/2 1/2 1/2 320
8 - 25-3/8 26-3/8 15-3/4 - 11 11-1/2 - 11 11-1/2 1/2 1 1/2 650
10 - 29-3/4 31-1/8 18-3/4 - 14-7/8 15-5/8 - 14-7/8 15-5/8 1 1 1 940
GLOBE
150#
GLOBE
300#
COVER TO
CENTER
ANGLE
THRD.
ANGLE
150#
ANGLE
300#
ANGLE
THRD.
ANGLE
150#
ANGLE
300#
PORT
SIZE
PORT
SIZE
PORT
SIZE
SHIPPING
WEIGHTS*
For larger sizes consult factory
Valve Cover Chamber Capacity
Valve Size (in) 1-1/4 1-1/2 2 2-1/2 3 4 6 8 10
.oz. 4 4 4 10 10 22 70
U.S. Gal - - - - - - -
- -
1-1/4 2-1/2
Valve Travel
Valve Size (in) 1-1/4 1-1/2 2 2-1/2 3 4 6 8 10
Travel (in) 3/8 3/8 1/2 5/8 3/4 1 1-1/2 2 2-1/2
8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
Cl a s s i C se r i e s
CAVITATION ZONE
INLET PRESSURE - PSI
OUTLET PRESSURE - PSI
300
280
260
240
220
200
180
160
140
120
100
80
60
40
20
0 10 20 40 50 60 70 80 90
130 14012011 0100
30
CAVITATION CHART
Sizing
F115-3 (Globe)
F1115-3 (Angle)
Size (in)
Maximum Continuous (GPM) 95 130 210 300 485 800 1850 3100 5000
Maximum Intermittent (GPM) 119 161 265 390 590 1000 2300 4000 6250
Minimum Continuous (GPM) 1 1 1 20 30 50 115 200 300
NOTE: The above chart is a suggested guide. Inlet pressure, outlet pressure, minumum, normal and maximum ow rates should
be considered for specic valve sizing. Contact Watts ACV for details.
1-1/4 1-1/2 2 2-1/2 3 4 6 8 10
Maximum continuous ow based on velocity of 20 ft. per second.
Maximum intermittent ow based on velocity of 25 ft. per second.
Minimum continuous ow based on velocity of 1 ft. per second.
Cavitation Chart
After selecting the valve size, locate inlet and outlet pressures on this chart. If the intersection point falls
in the shaded area, cavitation can occur. Operation of valves continually in the cavitation zone should be
avoided. Consult Watts ACV for alternatives.
8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
Cl a s s i C se r i e s
3
4
5
6
7
8
9
11
12
13
14
15
16
17
1
2
10
Cross-Sectional Detail
Main Valve
F115-3 (Globe)
F1115-3 (Angle)
ITEM DESCRIPTION MATERIAL
1 Cover ASTM A536 65-45-12 Epoxy Coated Ductile Iron
2 Cover Bearing SAE 841 Bronze
3 Shaft / Stem ASTM A276 304 Stainless Steel
4 Stud ASTM A570 Gr.33 Zinc Plated Steel
5 Cover Nut ASTM A570 Gr.33 Zinc Plated Steel
6 Diaphragm* Buna-N (Nitrile)
7 Body ASTM A536 65-45-12 Epoxy Coated Ductile Iron
8 Quad Seal* Buna-N (Nitrile)
9 Seat Ring ASTM A743 CF8M (316) Stainless Steel (8” and Smaller)
ASTM B62 Bronze (10” and Larger)
10 Spring ASTM A276 302 Stainless Steel
11 Stem Nut ASTM A276 304 Stainless Steel
12 Diaphragm Washer ASTM A536 65-45-12 Epoxy Coated Ductile Iron
13 Spacer ASTM A276 304 Stainless Steel
14
15 O-Ring* Buna-N (Nitrile)
16 Quad Seal Plate ASTM A743 CF8M (316) Stainless Steel (8” and Smaller)
17 Seat Gasket* Buna-N (Nitrile)
Quad Seal Retainer
ASTM A536 65-45-12 Epoxy Coated Ductile Iron
ASTM B62 Bronze (10” and Larger)
* Contained in Main Valve Repair Kit
8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
Cl a s s i C se r i e s
Controls and Accessories
Model 263AP
Pressure Reducing Pilot
F115-3 (Globe)
F1115-3 (Angle)
6
1
7
2
3
Inlet
ITEM
NUMBER
1 Adjusting Screw
2 Jam Nut
3 Spring Housing
4 Cap Screw
5 Body
6 Spring Guide
7 Spring
8 Diaphragm Assembly*
DESCRIPTION
Outlet
4
5
ITEM
NUMBER
9 Stem Assembly*
10 Bucking Spring
11 O-Ring*
12 Bottom Cap
8
9
10
11
Gauge
12
DESCRIPTION
*Included in Repair Kit
8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
F115-3 (Globe)
Cl a s s i C se r i e s
Installations
Prior to installation, ush line to remove debris.•
Install valve horizontally “in line” (cover facing UP), so ow arrow matches ow through the line. • Avoid
installing valves 6” and larger vertically. Consult factory prior to ordering if installation is other than
described.
Install inlet and outlet isolation valves. • NOTE: When using buttery valves, insure disc does not contact
control valve. Damage or improper valve seating may occur.
Provide adequate clearance for valve servicing and maintenance.•
Install pressure gauges to monitor valve inlet and outlet pressure.•
If installation is subjected to very low ow or potentially static conditions, it is recommended a pressure •
relief valve (1/2” minimum) be installed downstream of the Pressure Reducing Valve for additional system
protection.
Start-Up
Proper Automatic Control Valve start‑up requires bringing the valve into service in a controlled manner. All
adjustments to control pilots and speed controls should be made slowly, allowing the valve to respond and
the system to stabilize. NOTE: Control Valves should be setV up in a dynamic (owing) condition for
proper start‑up. Provisions for ow must be made to insure proper settings.
F1115-3 (Angle)
Close upstream and downstream valves to isolate the valve from line pressure. Release spring 1.
tension on Pressure Reducing Control by turning adjustment screw out (counterclockwise),
decreasing setpoint. Open all Isolation Ball Valves, if so equipped. If valve is tted with adjustable
speed controls, turn needle(s) in (clockwise) until seated, and return out (counterclockwise) 1‑1/2 to
2‑1/2 turns. These are approximate settings, and should be ne tuned to suit system requirements
after pressure adjustments have been made.
Slowly open upstream isolation valve to allow controlled lling of the valve. Vent entrapped air by 2.
carefully loosening control tubing or pipe plug at the highest point possible. If valve is equipped
with a Position Indicator, open Air Bleed Petcock to vent air. Water will be milky in appearance and
will begin to clear as air is vented. Carefully loosen enough cover screws on control pilot(s) to vent
entrapped air. Re‑tighten when water vents clearly.
Setting Reducing Control:3. Slowly open downstream isolation valve. Gradually turn adjustment
screw on the Pressure Reducing Control in (clockwise) to raise downstream pressure. Allow valve
and system to stabilize. Observe inlet and outlet pressure gauges. Continue to adjust as needed,
pausing approximately every 1‑1/2 turns, allowing valve and system to stabilize. Turning adjustment
screw clockwise raises outlet pressure. Turning adjustment screw counterclockwise lowers outlet
pressure. When desired downstream pressure is reached, tighten locknut on adjustment screw.
Fine tune Speed Controls to suit system requirements. Adjust Closing Speed Control (if equipped) 4.
clockwise for slower closure, and counterclockwise for faster closure. Adjust Opening Speed Control
(if equipped) clockwise for slower opening, and counterclockwise for faster opening.
8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
F115-3 (Globe)
Cl a s s i C se r i e s
Specications
The Pressure Reducing and Check Valve shall be a pilot operated diaphragm valve designed to automatically
reduce a uctuating higher upstream pressure to a constant lower downstream pressure regardless of varying
ow rates, and close drip-tight when downstream pressure becomes greater than upstream pressure.
The main valve shall be a hydraulically operated, single diaphragm actuated, globe or angle pattern valve.
Y-pattern valves shall not be permitted. The valve shall contain a disc and diaphragm assembly that forms
a sealed chamber below the valve cover, separating operating pressure from line pressure. The diaphragm
shall be constructed of nylon reinforced Buna-N, and shall not seal directly against the valve seat and shall
be fully supported by the valve body and cover. Rolling diaphragm construction will not be allowed and there
shall be no pistons operating the main valve or any pilot controls.
The main valve body and cover shall be Ductile Iron ASTM A536, and all internal cast components shall be
Ductile Iron or CF8M (316) Stainless Steel. All Ductile Iron components, including the body and cover, shall
be lined and coated with an NSF 61 Certied Epoxy Coating applied by the electrostatic heat fusion process.
All main valve throttling components (valve seat and disc guide) shall be Stainless Steel. The valve body
and cover must be machined with a 360-degree locating lip to assure proper alignment.
F1115-3 (Angle)
The disc and diaphragm assembly shall contain a Buna-N synthetic rubber “Quad Seal” that is securely
retained on 3-1/2 sides by a disc retainer and disc guide. Diaphragm assemblies utilizing bolts or cap
screws for component retention will not be permitted.
The exposed portion of the Quad Seal shall contact the valve seat and seal drip-tight. The disc and diaphragm
assembly must be guided by two separate bearings, one installed in the valve cover and one concentrically
located within the valve seat, to avoid deection and assure positive disc-to-seat contact. Center guided
valves will not be permitted. All necessary repairs shall be made from the top of the valve while the body
remains in line.
The exposed portion of the seat disc shall contact the valve seat and seal drip-tight. The disc and diaphragm
assembly must be guided by two separate bearings, one installed in the valve cover and one concentrically
located within the valve seat, to avoid deection and assure positive disc-to-seat contact. Center guided
valves will not be permitted. All necessary repairs shall be made from the top of the valve while the body
remains in line.
Pilot control systems for valves 3” and smaller shall contain a Flow Clean Strainer, Fixed Orice Closing
Speed, Adjustable Opening Speed Control, (2) Check Valves and a Pressure Reducing Pilot. Pilot control
systems for valves 4” and larger shall contain an external Y-Strainer, Fixed Orice Closing Speed, (2) Check
Valves, Pressure Reducing Pilot and Isolation Ball Valves on all body connections. All pilot control systems
shall utilize copper tubing and brass ttings regardless of valve size. The adjustment range of the pressure
reducing pilot shall be 30-300 psi.
The valve shall be Watts ACV Model F115-3 (Globe) or F1115-3 (Angle) pattern Pressure Reducing Control
Valve with Hydraulic Check Feature.
Other Watts ACV Pressure Reducing Control Valves
F115 / F1115 Pressure Reducing Valve
F115-7 / F1115-7 Pressure Reducing Valve with Downstream Surge Control Feature
F115-74 / F1115-74 Pressure Reducing Valve with Low Flow By-Pass
8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
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