Val-Matic Rubber-Seated Ball Valve - Manual (Page 2)

2
CAUTION: Do not use valve for line testing at
pressures higher than nameplate
rating or leakage and damage to
valve may occur.
VAL-MATIC'S 4"-48" SERIES 4000 BALL VALVE
OPERATION, MAINTENANCE AND INSTALLATION
INTRODUCTION
The Series 4000 Ball Valve has been designed to
provide long 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 a resilient seated, quarter-turn valve capable of
handling water and wastewater. The Size, Cold
Working Pressure (CWP), and Model No. are stamped
on the nameplate for reference.
The "Cold Working Pressure" is the non-shock
pressure rating of the valve at 150
o F. On pump
discharge service, the valve is intended for flow toward
the seat end of the valve. The “Seat End” is marked
on the nameplate for single-seated valves. This allows
seat adjustment while the valve is holding system
pressure. Double seated valves can be installed with
flow and pressure in either direction.
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. Lift valve
with straps or hooks in the lifting eyes integrally cast on
the body flanges. Extra care must be taken when
handling electric motor and cylinder actuated valves.
Valves should remain crated, clean and dry until
installed to prevent weather related damage. The valve
is shipped slightly open to maintain the resilient seat in
the un-loaded condition.
For long-term storage greater than six months, indoor
storage is recommended. The valve flange covers
must remain in place, the valve must remain slightly
open (3-5 degrees), and the rubber surfaces of the ball
should be coated with a thin film of FDA approved
grease such as Dow Corning # 7. Do not expose the
resilient seat to sunlight or ozone for any extended
period.
DESCRIPTION OF OPERATION
As shown in Figure 1, the valve consists of a two-piece
body, cast ball, and shafts that rotate in shaft bearings.
The ball is centered in the body with a thrust bearing
assembly. The resilient seats provide drop-tight
shutoff.
FIGURE 1. RESILIENT-SEATED BALL VALVE
The ball is rigidly attached to the shaft with taper pins.
The actuator rotates the valve shaft and ball through
90 degrees of operation. The ball can rotate through
the seat, but is factory set to stop in the center of the
seat to provide tight shut off. Additional torque on the
actuator when against the closed stop of the actuator
will not provide tighter shut off. The valve seat is easily
adjustable or replaceable should wear or damage
occur over time.
The valve is operated with a traveling nut manual
actuator; see Figure 3, which requires multi-turn input
on a handwheel or nut. The valve can also be
automated with power actuators such as an electric
motor or hydraulic cylinder.