Watts M61115 User Manual

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Y/FC

P/L

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CLOSES VALVE

OPENS VALVE

FLOW

(AOS)

PRESSURE REDUCING

CONTROL VALVE

06/08

Mu s t a n g se r i e s

Schematic

Throttles to reduce high upstream pressure to •
constant lower downstream pressure

M6115 (Globe)

M61115 (Angle)

Reducing setpoint is adjustable•

Standard Components

1 – Main Valve (Single Chamber)
2 – Pressure Reducing Control

3 – Fixed Orice

Options & Accessories

X – Isolation Cocks ○
FC – Flo-Clean Strainer ○
Y – Y-Strainer (Replaces Flo-Clean) ○
ACS – Adjustable Closing Speed ○

(Replaces Fixed Orice)

AOS – Adjustable Opening Speed ○
P – Position Indicator ○
L – Limit Switch ○

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(1)

(3)

(3)

(1)

Standard 3” & Smaller

(2)

Standard 4” & Larger

(3)

Optional All Sizes

(2)

(3)

(1)

Operations

The Watts ACV Pressure Reducing Control Valve is designed to automatically reduce a uctuating higher
upstream pressure to a constant lower downstream pressure regardless of varying ow rates. 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 pres-

sure. An increase in downstream pressure causes the valve to modulate toward a closed position, lowering
downstream pressure.

8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com

Mu s t a n g se r i e s

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M6115 (Globe)

M61115 (Angle)

Materials

Body & Cover: Ductile Iron ASTM A536

Coating: NSF Listed Fusion Bonded

Epoxy Lined and Coated

Trim: 316 Stainless Steel

Elastomers: Buna-N (standard)

EPDM
Viton

Stem, Nut & Stainless Steel
Spring:

Operating Pressure

Threaded = 400 psi
150 Flanged = 250 psi
300 Flanged = 400 psi

Operating Tempera-

Operating Temperature

ture

Buna-N: 160°F Maximum

EPDM: 300°F Maximum

Viton: 250°F Maximum

Globe

Pilot System

Reducing Control

30-300 psi (Standard)

0-30 psi (Optional)

Angle

Tubing & Fittings

Copper / Brass (Standard)

Stainless Steel (Optional)

Dimensions

A B C D E F G H I

VALVE

SIZE

3 10-1/4 11 7 - - - - 3/8 1/2 21

4 13-7/8 14-1/2 8-5/8 6-15/16 7-1/4 5-1/2 5-13/16 1/2 1/2 39

6 17-3/4 18-5/8 11-5/8 8-7/8 9-3/8 6-3/4 7-1/4 3/4 3/4 89

8 21-3/8 22-3/8 15 10-11/16 11-3/16 7-1/4 7-3/4 3/4 3/4 150

10 26 27-3/8 17-7/8 - - - - 1 1 283

GLOBE

150#

GLOBE

300#

COVER TO

CENTER

ANGLE

150#

ANGLE

300#

ANGLE

150#

ANGLE

300#

PORT

SIZE

PORT

SIZE

SHIPPING

WEIGHTS*

For larger sizes consult factory

Valve Cover Chamber Capacity

Valve Size (in) 3 4 6 8 10

.oz. 4 10 22 70

U.S. Gal

- - - -

-

1-1/4

Valve Travel

Valve Size (in) 3 4 6 8 10

(in) 1/2 3/4 1 1-1/2 2

8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com

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

M6115 (Globe)

Mu s t a n g se r i e s

Sizing

Size (in) 3 4 6 8 10

Maximum Continuous (GPM) 260 580 1025 2300 4100

Minimum Continuous (GPM) 1 30 50 115 200

Maximum continuous ow based on velocity of 20 ft. per second.

Minimum continuous ow based on velocity of 1 ft. per second.

NOTE: The above chart is a suggested guide. Inlet pressure, outlet pressure, minumum, normal and maximum ow rates should
be considered for specic valve sizing. Contact Watts ACV for details.

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.

M61115 (Angle)

8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com

Mu s t a n g se r i e s

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Cross-Sectional Detail

Main Valve

M6115 (Globe)

M61115 (Angle)

ITEM DESCRIPTION MATERIAL

1 Cover ASTM A536 65-45-12 Epoxy Coated Ductile Iron

2 Cover Bearing ASTM A276 304 Stainless Steel

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 Seat Disc* Buna-N (Nitrile)

9 Seat Ring ASTM A743 CF8M (316) Stainless Steel

10 Spring ASTM A276 302 Stainless Steel

11 Stem Nut ASTM A276 304 Stainless Steel

12 Spring Washer ASTM A276 304 Stainless Steel

13 Diaphragm Washer ASTM A536 65-45-12 Epoxy Coated Ductile Iron

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15 Spacer Washer* Fiber*

16 Disc Guide ASTM A743 CF8M (316) Stainless Steel

17 Seat Gasket* Buna-N (Nitrile)

Disc Retainer

ASTM A536 65-45-12 Epoxy Coated Ductile Iron

* Contained in Main Valve Repair Kit

8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com

Mu s t a n g se r i e s

Controls and Accessories

Model CP-15

Pressure Reducing Pilot

M6115 (Globe)

M61115 (Angle)

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Front View Side View

ITEM

NUMBER

1 Adjusting Screw

2 Jam Nut

3 Spring Housing

4 Spring

5 Cap Screw

6 Body

7 Seat

8 O-Ring*

9 Bottom Cap

10 Spring Guide

DESCRIPTION

9

ITEM

NUMBER

11 Nut

12 Belleville Washer

13 Diaphragm Washer

14 Diaphragm *

15 Yoke

16 Disc and Retainer Assembly*

DESCRIPTION

* Included in Repair Kit

8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com

M6115 (Globe)

Mu s t a n g 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 buttery 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 set‑up in a dynamic (owing) condition for
proper start‑up. Provisions for ow must be made to insure proper settings.

M61115 (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

M6115 (Globe)

Mu s t a n g se r i e s

Specications

The Pressure Reducing Control 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.

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 Certied Epoxy Coating applied by the electrostatic heat fusion process.

All main valve trim and throttling components (cover bearing, 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.

M61115 (Angle)

The disc and diaphragm assembly shall contain a Buna-N synthetic rubber disc with a rectangular cross-

section 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 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 deection 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 3” valves shall contain a Flow Clean Strainer, Fixed Orice Closing Speed, Adjust­able Opening Speed Control and Pressure Reducing Pilot. Pilot control systems for valves 4” and larger
shall contain an external Y-Strainer, Fixed Orice Closing Speed, 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 M6115 (Globe) or M61115 (Angle) pattern Pressure Reducing Control

Valve.

Other Watts ACV Pressure Reducing Control Valves

M6115-3 / M61115-3 Pressure Reducing Valve with Hydraulic Check Feature
M6115-7 / M61115-7 Pressure Reducing Valve with Downstream Surge Control Feature
M6115-74 M61115 -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