Victaulic 867-42T Installation, Operation And Maintenance Manual

HANG THESE INSTRUCTIONS ON THE

INSTALLED VALVE FOR FUTURE REFERENCE

WARNING

• Read and understand all instructions before attempting to install, remove, adjust, or perform maintenance on any Victaulic piping products.

• Depressurize and drain piping systems before attempting to install, remove, adjust, or perform maintenance on any Victaulic piping
products.

• Wear safety glasses, hardhat, and foot protection.

• Save this installation, operation, and maintenance manual for future reference.

Failure to follow instructions and warnings could cause system failure, resulting in death or serious personal injury and property damage.

I-867-42TINSTALLATION, OPERATION, AND MAINTENANCE MANUAL

867-42T Pressure Reducing Valve

I- 867- 42T

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I-867-42T / Pressure Reducing Valve / Installation, Operation, and Maintenance Manual

TABLE OF CONTENTS

Hazard Identification ..................................4

Safety Instructions ................................... 4

Introduction ........................................4

Pressure and Flow Ratings ..............................5

Head Loss .........................................5

Installation .........................................6

Operation ..........................................7

Start Up..............................................8

Readjusting ...........................................8

Maintenance And Inspection Tests ........................9

Weekly Inspection ......................................9

Monthly Inspection And Test ..............................9

Troubleshooting......................................9

Difficulty In Performance ..............................9

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I-867-42T / Pressure Reducing Valve / Installation, Operation, and Maintenance Manual

HAZARD IDENTIFICATION

Definitions for identifying the various hazard levels are provided below.

This safety alert symbol indicates important safety messages.
When you see this symbol, be alert to the possibility of
personal injury. Carefully read and fully understand the
message that follows.

DANGER

• The use of the word “DANGER” identifies an immediate
hazard with a likelihood of death or serious personal injury
if instructions, including recommended precautions, are not
followed.

WARNING

• The use of the word “WARNING” identifies the presence
of hazards or unsafe practices that could result in death or
serious personal injury if instructions, including recommended
precautions, are not followed.

CAUTION

• The use of the word “CAUTION” identifies possible hazards or
unsafe practices that could result in personal injury and product
or property damage if instructions, including recommended
precautions, are not followed.

NOTICE

• The use of the word “NOTICE” identifies special instructions that
are important but not related to hazards.

SAFETY INSTRUCTIONS

WARNING

• An experienced, trained installer
must install this product in
accordance with all instructions.
These i nstructions contain important
information.

• Depressurize and drain the piping
system before attempting to install,
remove, adjust, or maintain any
Victaulic piping products.

Failure to follow these instructions
can cause product failure, resulting in
death or serious personal injury and
property damage.

1. Read and understand all instructions before proceeding with the
installation, operation, and maintenance of this valve. For proper

operation and approval, the 867-42T valve and accessories
must be installed in accordance with the specific instructions included
with the shipment.

2. Use only recommended accessories. Accessories and equipment
that are not approved for use with this valve may cause improper system
operation.

3. Wear safety glasses, hardhat, foot protection, and hearing
protection. Wear hearing protection if you are exposed to long periods of

noisy jobsite operations.

4. Prevent back injury. Large and pre-trimmed valves are heavy
and require more than one person (or mechanical lifting equipment)
to position and install the assembly. Always practice proper lifting
techniques.

5. Avoid using electrically powered tools in dangerous environments.
When using electrically powered tools for installation, ensure that the
area is moisture-free. Keep the work area well lit, and allow enough
space to accommodate proper installation of the valve, trim, and
accessories.

6. Watch for pinch points. Do not place fingers under the valve body
where they could be pinched by the weight of the valve. Use caution
around spring-loaded components.

7. Keep work areas clean. Cluttered areas, benches, and slippery floors
can create hazardous working conditions.

INTRODUCTION

NOTICE

• Drawings and/or pictures in this manual may be exaggerated for
cla rity.

• The valve, along with this operating and maintenance manual,
contains trademarks, copyrights, and/or patented features that
are the exclusive property of Victaulic.

The 867-42T is an elastomeric, line-pressure driven, pilot-operated
pressure control valve that is designed for fire protection systems.

The 867-42T reduces high upstream pressure to a precise, preset,
stable downstream pressure. The 867-42T is suitable for control of
fire pump discharge. It is also suitable for preventing over-pressure in
sprinklers, hose stations, and other discharge devices.

Valve sizes covered by this manual include 1.5 through 10 inches. Max
recommended pressure differential: 175 psi (12 bar) when normal inlet
operation pressure is below 330 psi/23 bar. Max recommended pressure
differential: 200 psi (14 bar) when normal inlet operation pressure is
above 330 psi/23 bar.

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I-867-42T / Pressure Reducing Valve / Installation, Operation, and Maintenance Manual

PRESSURE AND FLOW RATINGS

The 867-42T pressure reducing valve, sizes 1.5-, 2-, 2.5-, 3-, 4-, 6-, 8-, and 10-inch, are rated for the following pressure and flow capacities detailed
in Table 1.

NOTE: Maximum flows below are at a differential of 175 psi (12 bar). Contact Victaulic if your system has greater than 175 psi differential.

Table 1: Pressure Ratings and Flow Capacity

Valve Size
inches/mm

1.5
40

2

50

3

80

4

100

6

150

8

200

10

250

Max. inlet pressure
psi/bar

365 25365

25

365 25365

25

365

25

365 25365

25

Outlet pressure
setting range
psi/bar

30–175

2–12

30–175

2–12

30–175

2–12

30–175

2–12

30–175

2–12

30–175

2–12

30–175

2–12

Max. recommended flow
GPM / m³/h

106 24172

39

360 82640

145

1450

330

2570

580

4000

910

Min. recommended flow
GPM / m³/h

20

5

20

5

20

5

20

5

20

5

20

5

45
10

Pilot valve model

2-PB 2-PB 2-PB 2-PB 2-PB

2-UL/

2-PBL

2-UL/

2-PBL

Recommended relief valve
in/mm

¾

20

¾

20

1 ½

40

2

50

3

80

3

80

4

100

HEAD LOSS

The minimum ∆P across the valve is 5.8 psi (0.4 bar). In cases where the inlet pressure falls below or is equal to the intended outlet pressure, the
outlet pressure shall be determined according to Table 2: Frictional Resistance.

In the case of zero (static) flow through the valve, the maximum increase in the downstream (outlet) pressure above the set pressure of the valve will
not exceed 7.2 psi (0.5 bar).

Table 2: Frictional Resistance

Valve Size Full Open Equivalent Length of Pipe

Nominal Size

inches/DN

Actual Ouside Diameter

inches/mm

Flow Coefficient

C v / K

v

feet/meters

1 ½

DN40

1.900

48.3

79
68

7
2

2

DN50

2.375

60.3

92
80

16

5

2 ½

2.875

73.0

116
100

28

9

3

DN80

3.500

88.9

219
190

23

7

4

DN100

4.500

114.3

398
345

30

9

6

DN150

6.625

168.3

912
790

49
15

8

DN200

8.625

219.1

1160
1160

89
27

10

DN250

10.750

273.0

1662
1355

203

62

Note 1: Valve Equivalent L ength Value (Steel P ipe), for use in hydraulically c alculated syste m

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I-867-42T / Pressure Reducing Valve / Installation, Operation, and Maintenance Manual

INSTALLATION

A typical installation of the 8 67-42T features a pilot valve for the automatic reduction of water pressure from a high upstream value to a preset lower
downstream value, regardless of fluctuating upstream pressure or flow. The actuator design ensures quick and smooth valve action.

Installed singly, the 867-42T provides a standard pressure-reducing system. Installed in parallel, two 867-42T valves provide high flow rates,
redundancy, and zero downtime for maintenance. Installed in series, two 867-42T valves provide a two-stage, high reduction in pressure and/or
added protection to a reduced-pressure zone.

Sprinkler System Pressure Reduction

• Reduces a high, unstable pressure supply
to a preset, stable system pressure.

• Sets the sprinkler pressure to suit the system design

• For pressure control of zones

Hose System Pressure Reduction

• Reduces a high/unstable pressure supply
to suit fire hose pressure

• Limits fire hose pressure to 100 psi/7 bar
to meet NFPA 14 regulations for maximum
allowable hose pressure supply.

Two-Stage Pressure Reduction

• High pressure reduction to a low, preset,
stable system pressure (when required pressure
reduction differential is more than 175 psi/12 bar)

• Backup pressure reducing valve in-line to a
master valve to secure pressure zone rating
at all times.

Figure 1 Installation Drawing

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I-867-42T / Pressure Reducing Valve / Installation, Operation, and Maintenance Manual

OPERATION

The 867-42T pressure control valve reduces water pressure
automatically from a high inlet pressure to a lower, pre-set outlet
pressure. The outlet set pressure can be adjusted with the pilot
valve adjusting screw (Figure 2, call out 5). The valve operates
under both flow and static conditions. The pressure-reducing pilot
valve (Figure 2, call out 4) senses changes in outlet pressure
(Figure 2, call out 6) and modulates the control valve to maintain
the pre-set outlet pressure.

When outlet pressure rises above the pre-set pressure, the pilot valve
throttles, enabling pressure to accumulate in the control chamber
(Figure 2, call out 1). This causes the control valve to close further and
reduce outlet pressure. When outlet pressure falls, the pilot valve opens
wider, releasing pressure from the control chamber. This causes the
control valve to open wider and increase outlet pressure. An integral
restrictor (Figure 2, call out 3A) controls the valve’s closing speed.
For valves 8 inches and larger, an adjustable needle valve (Figure 2,
call out 3B) is provided.

Figure 2 Operation Drawing

Valve Closed Valve Open (pressure relief)

4

5

6

2

3

A

1

Valve Closed Valve Open (pressure relief)

2

3B

6

4

5

1

Valves 6 inches
and smaller

Valves 8 inches
and larger

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I-867-42T / Pressure Reducing Valve / Installation, Operation, and Maintenance Manual

START UP

When performing this procedure, refer to Figure 2.

1. Open a hydrant, relief valve, drain valve, or other flow-consumer

downstream of the 867-42T pressure reducing valve, creating a
system demand.

2. Fully open upstream indicating valve.

3. Gradually open downstream indicating valve to fully open, allowing

flow through the 867-42T valve.

4. Wait for downstream pressure stability.

5. Slowly close the flow-consumer that was opened in step #1 above

to fully closed.

6. There should be no system flow; the downstream pressure should

be between the factory the pre-set pressure and up to 10%
different. Follow the readjusting procedure if needed to be changed.

READJUSTING

The pilot valve is factory pre-set according to the stated demands of the
customer.

The pre-set is clearly indicated on the pilot valve tag. If readjustment to
either the pressure or valve response is required, perform the following
steps.

1. When readjusting the outlet pressure, the inlet pressure should be

at least 20 psi (1.4 bar) higher than the set outlet pressure.

2. The flow rate during adjustment should be as close as possible to

the systems design flow rate. Where this is not possible, at least a
minimal flow is essential.

3. Free the tension between the adjusting screw on the pressure

reducing pilot valve (Figure 2, call out 4) and the fastening nut by
turning the fastening nut counterclockwise.

4. By alternately turning the adjusting screw on the pilot valve a

half turn and then reading the downstream pressure, gradually
adjust the pressure counterclockwise to decrease the downstream
pressure, or clockwise to increase the downstream pressure.

5. Repeat the start up procedure in the previous section.

CAUTION: If needle valve is furnished (optional), changes in

the adjustment of the needle valve will have impact on the valve
performance. The needle valve is factory set at one-half turn open to one
and one-half turn open. The maximum number of turns is 3 from fully
closed to fully open. More than 3 turns open might cause the valve to
perform at less than optimal functioning. Perform Start Up step 5 with
this in mind.

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I-867-42T / Pressure Reducing Valve / Installation, Operation, and Maintenance Manual

MAINTENANCE AND INSPECTION TESTS

NOTICE

• Any activities that require taking the valve out of service may
eliminate the fire protection provided.

• Consideration of a fire patrol should be given for the affected
areas.

• Before servicing or testing the system, notify the authority having
jurisdiction.

Prior to turning off any valves or activating any alarms, notify local
security guards and the central alarm station, if used, so that a false
alarm will not be signaled.

In any of the following inspections or testing procedures, if an abnormal
condition exists, see the troubleshooting section for possible cause and
corrective action.

The 867-42T valve is to be inspected, tested, and maintained in
accordance with this manual and with NFPA 25.

WEEKLY INSPECTION

1. The system should be inspected under flow conditions.

2. Check that the main valve, pilot system, accessories, tubing, and

fittings are all in good condition, are free of damage, and are not
leaking.

3. The fastening nut of the pilot valve adjusting screw (Figure 2, call
out 5) should be fastened tightly.

4. For circulation-type installations, verify that sufficient water is
flowing through the valve when the fire pump is operating at
shut-off pressure (churn) to prevent the pump from overheating.

5. Verify that the pressure upstream of the relief valve fittings in the
fire pump discharge piping does not exceed the pressure for which
the system components are rated.

MONTHLY INSPECTION AND TEST

1. Complete weekly inspection.

2. During the monthly fire pump flow test, verify that the pressure

relief valve is correctly set to relieve at the appropriate pressure and
to close below the pressure setting.

TROUBLESHOOTING

Problem Possible Cause Solution

Valve fails to regulate. Needle valve not properly adjusted. Factory set at ½ or 1½ open. Adjust.

Pulsates or hunts. Slowly adjust needle valve until pulsation stops.

Air trapped in main valve cover.

Loosen cover tube tting at the highest point, allow the air
to escape, and re-tighten.

Filter screen blocked.

Remove lter’s cap and screen to clean. Filter might be
insucient. See note below.

Valve fails to open. Insucient inlet pressure. Check/create inlet pressure.

Pilot is adjusted too high. Turn adjusting screw CCW on pilot.

Valve fails to seal inlet
pressure.

Filter screen blocked. Remove lter’s cap and screen to clean. Filter might be

insucient. See note below.

Debris trapped in main valve. Remove and inspect actuator assembly. Check seat. Check for

foreign bodies. Rinse at high ow rate.

Diaphragm in main valve is leaking.

Open the valve cover and inspect diaphragm. If damaged,
replace.

Diaphragm in pilot valve is leaking.

NOTE: Mark “F” – Large Filter

In cases where the filter screen frequently becomes blocked, install a filter with filtration capacity of at least 80 mesh / 250 µm.

DIFFICULTY IN PERFORMANCE

Where difficulty in performance is experienced, the manufacturer or an
authorized representative should be contacted to determine if any field
adjustment is to be made.

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I-867-42TINSTALLATION, OPERATION, AND MAINTENANCE MANUAL

867-42T Pressure Reducing Valve

For complete contact information, visit victaulic.com

I-867-42T 9680 REV B UPDATED 11/2016

VICTAULIC IS A REGISTERED TRADEMARK OR TRADEMARK OF VICTAULIC COMPANY AND/OR ITS AFFILIATED ENTITIES
IN THE UNITED STATES AND/OR OTHER COUNTRIES. © 2016 VICTAULIC COMPANY. ALL RIGHTS RESERVED.