Val-Matic Cam-Centric Plug Valve User Manual

Manual No.
CCPV-OM2-3

®

Val-Matic

Cam-Centric® Plug Valve

Operation, Maintenance and

Installation Manual

INTRODUCTION ........................................ 2

RECEIVING AND STORAGE .................... 2

DESCRIPTION OF OPERATION ............... 2

VALVE CONSTRUCTION .......................... 3

INSTALLATION .......................................... 4

MAINTENANCE ......................................... 7

TROUBLESHOOTING ............................... 9

DISASSEMBLY .......................................... 9

REASSEMBLY ......................................... 10

PARTS & SERVICE ................................. 11

WARRANTY ............................................. 11

VALVE AND MANUFACTURING CORP.

905 Riverside Dr. ● Elmhurst, IL 60126
Phone [phone] ● Fax [phone]
www.valmatic.com

VAL-MATIC'S CAM-CENTRIC PLUG VALVE

OPERATION, MAINTENANCE AND INSTALLATION

INTRODUCTION

The Cam-Centric
give years of trouble-free operation. This manual will
provide you with the information to properly install and
maintain the valve to ensure a long service life. The
valve is an eccentric, resilient seated, quarter-turn plug
valve capable of handling many types of fluids
including fluids with suspended solids. The Size,
Cold Working Pressure (CWP), Actuator Rating, and
Model No. are stamped on the nameplate for
reference.

CAUTION: Do not use valve for line testing at
pressures higher than nameplate rating or
leakage and damage to valve may occur.

The "Cold Working Pressure" is the non-shock
pressure rating of the valve at 150
intended as a block valve for line testing above the
valve rating. The “Actuator Rating” is the pressure that
was used to size the actuator for operating conditions
and may be less than the “Cold Working Pressure”.
Because the valve is eccentric, the valve may have a
different actuator rating for reverse and direct pressure.
If the valve is operated at pressures higher than the
actuator ratings, the valve may be difficult to operate or
leak.

RECEIVING AND STORAGE

Inspect valves upon receipt for damage in shipment.
Unload all valves carefully to the ground without
dropping. Do not lift valves with slings or chains
around the actuator or through the seat area.

Valves should remain crated, clean and dry until
installed to prevent weather-related damage. For long
term storage greater than six months, the valve must
remain open and the rubber surfaces of the plug
coated with a thin film of FDA approved grease such
as Dow Corning # 7. Do not expose plug to sunlight or
ozone for any extended period.

DESCRIPTION OF OPERATION

As shown in Figure 2, the valve consists of a body and
quarter-turn plug that is offset from the seat centerline.



Plug Valve has been designed to

o

F. The valve is not

FIGURE 1. PLUG VALVE WITH GEAR ACTUATOR

The eccentric offset causes the plug to lift and rotate
off the seat simultaneously to reduce seat friction and
wear during operation. Direct Pressure pushes the
plug into the seat and Reverse Pressure pushes the
plug away from the seat. The valve can be operated
with a direct nut, lever, or gear actuator. The gear
actuator as shown in Figure 1 requires multi-turn input
on a 2” square nut, handwheel, or chainwheel. The
valve can also be automated with power actuators
such as an electric motor or hydraulic cylinder.

FIGURE 2. PLUG VALVE TERMS

2

VALVE CONSTRUCTION

The standard Cam-Centric

®

Plug Valve is constructed
of rugged cast iron with a welded nickel seat and
permanently lubricated bearings. See the specific
Materials List submitted for the order if other than
standard cast iron construction. The details of
construction are illustrated in Figure 3.

The body (1) is available with flanged or mechanical
joint ends for connection to the pipeline. The valve is
designed to be serviced in-line by removing the cast
cover (2). The quarter-turn plug (3) is guided by sleeve
bearings (6) located in the cover and lower boss in the
body. Grit-Guard seals (21) are located at the bottom
of the bearings (6) to prevent abrasive material from
wearing the bearing. Leak-tight closure is made when
the rubber-coated plug (3) is rotated into the nickel
seat on the “SEAT END” of the body.

ITEM DESCRIPTION MATERIAL

1 Body Cast Iron with Overlay

2 Cover Cast Iron
3 Plug* Cast Iron with

6 Bearings* 316 Stainless Steel
7 V-Type Packing* Buna-N
8 Cover Seal* Buna-N
15 Cover Bolt Alloy Steel, Gr 5
18 Packing Follower Cast Iron
19 Follower Bolt Alloy Steel, Gr. 5
21 Grit-Guard* Buna-N
22 Thrust Bearing* Teflon
23 Thrust Bearing* 316 Stainless Steel
24 Key Carbon Steel
29 Shims 304 Stainless Steel

*RECOMMENDED SPARE PART

Welded Nickel Seat

Resilient Facing

TABLE 1. STANDARD PLUG VALVE PARTS LIST

FIGURE 3. STANDARD PLUG VALVE CONSTRUCTION

3

INSTALLATION

The installation of the valve is important for its proper
operation. The valve is capable of flow in either
direction but the maximum operating pressure can vary
with the location of the seat end. The words “SEAT
END” are marked on the valve flange. Actuators are
available for pressures up to the full rating in both
direct and reverse pressure orientations. Actuator
ratings will be indicated on the nameplate. Higher
operating pressures may require adjustment of the
closed position stop or a larger actuator; consult the
factory.

SUSPENDED SOLIDS SERVICE: For fluids
containing suspended solids, special orientations are
needed to prevent debris from collecting in the valve.
For horizontal installations (Figure 4), the valve should
be installed with the flow entering the seat end of the
valve and the shaft in a horizontal position with the
plug up when open. For vertical installations (Figure

5), the valve must be installed with the seat end up
regardless of flow direction.

CLEAN SERVICE: For both horizontal and vertical
installations, install in the direct pressure orientation
(pressure opposite the seat end).

AIR AND GAS SERVICE: Install valve in the direct
pressure orientation (pressure opposite the seat end).
Lubricate plug face with FDA approved silicone grease
such as Dow Corning #7 before installation. Gear
actuators are required for gas service applications.

PUMP DISCHARGE SERVICE: On all horizontal
pump discharge applications (Figure 6), the seat end
should be towards the pump.

BURIED SERVICE: Gear actuators are recommended
for buried valves to hold the valve in position and
provide multi-turn closure to prevent water hammer.
The valve should be installed with the shaft horizontal
and the actuator nut directed upwards. The valve box
or extension pipe should be installed so that the
actuator nut and extension stem turn freely.

NOTE: Adjust and test valve prior to backfill.

FIGURE 4. HORIZONTAL PIPE WITH SOLIDS

FIGURE 5. VERTICAL PIPE WITH SOLIDS

FIGURE 6. PUMP DISCHARGE SERVICE

4