VN 900 to 3000 – 4F and – 6F Specifications
Tank (Standard Non Code Vessels).
The non-code vessel
shall be A36 carbon steel or better rated at 100 psi working pressure
designed to a factor of safety of 3.0.
Tank (Optional Code Vessels).
ASME code stamped
tanks shall be available. Tank shall be clearly specified as code or
non-code with a specified working pressure. Tanks “built to ASME code
but not stamped” shall not be acceptable as ASME code. An ASME U1 form
shall be provided with each ASME code tank.
Tanks shall be prepared for internal and external coating with a SPCC 11
near white sand blast. Internal and external coating shall be two 3 - 4
mill coats of white Series 20 Tnemic Epoxy. Paint shall be applied
according to manufacturer’s recommendations.
bottom distributor shall be hub and lateral design with SCH 80 PVC hub
and SCH 40 PVC slotted laterals. The slots shall be .012" - .016" wide
to retain mineral and the total slot area shall be equal to or larger
than the unit pipe size. A four point SCH 80 PVC upper distributor with
an opening equal to or larger than the unit pipe size shall be installed
in the mineral tank.
models with a –4F or –6F designation the inlet and outlet connection
shall be 4” or 6” flanges and the pipe shall be schedule 40 galvanized
grooved fittings. Tanks shall have double drilled double tapped pad
flanges on the side shell for inlet and outlet.
The resin shall be sodium form polystyrene 8% divinyl benzene cross
linked resin with clear spherical beads. Resin beads shall be 16-50 US
Standard Mesh with a particle size range of 0.3 to 1.2 mm. The resin
shall be clean and packaged in sealed plastic bags weighing 55 lbs or
less. Underbedding shall be #20 graded washed flint gravel sieved
between 1/8” and 1/16”.
shall be Water King DMB Series cast iron body valves with grooved
connections. The valve can be operated by air or water. The diaphragm
shall be preformed, nylon fabric reinforced natural rubber. Internal
parts shall be stainless steel and brass. Working pressure on the valve
is 230 psi with maximum temperature of 175oF.
valves shall be operated by a rotary pilot valve (stager) with multiple
ports through which control fluid is directed, thereby operating the
diaphragm valves installed in a process system. Standard units shall
use stagers constructed of durable, non-corroding, self-lubricating
material for long, maintenance free life. The stager shall function by
opening and closing its ports, singly or in combination, in a sequence
that accomplishes the five cycles of softening. The stager shall use
either water or air for the operating fluid. Process fluid, if
pressurized, and not damaging to the internal parts of the stager or
diaphragm valve, may be drawn from the main line to the inlet of the
stager. Otherwise, an independent source of control fluid is required.
The pressure of the control fluid must be equal to or greater than the
line pressure of the system. The stager enclosure shall be a 10” x 8” x
6” NEMA 4 fiberglass control box which houses both the stager and the
timer. Maximum pressure shall be 100 psi with a maximum temperature
rating of 150oF. Ports are 1/8” NPT. Power shall be either
120 VAC/60 Hz or 230 VAC/50 Hz. Flexible tubing (¼” O.D.) shall connect
stager ports to diaphragm valves.
The brine system shall be of the Accumaticä
high grid plate design. The brine tank shall be rotationally molded
HDPE or fiberglass, including a cover. The system shall include a SCH 80
PVC float operated brine valve to control refill shut-off and refill
flow rate. Brine volume is to be repeatedly accurate within 10% and not
dependent on salt bed void space for brine volume. Brine draw is to
volumetrically controlled, not timed.
The vessel shall be equipped with a header lateral brine distributor
system allowing brine to enter above the bed rather than through the
Brine shall be drawn directly into brine header using an EE series
external ejector. This venturi type device shall be SCH 80 PVC with 1”
or 1 ½” FNPT connections. The venturi shall be chemically bonded to the
housing. The venturi shall be precision machined. Maximum temperature
shall be 140°F. The external injector shall provide both brine flow and
Maximum temperature shall be
Pressure shall be 25 to 100 psi.
systems shall consist of one mineral tank with attached valve nest and
one brine tank. Simplex systems shall be controlled using the ERCt
99-day electronic timer and an MPV1 stager both housed in a single NEMA
4 enclosure. Regeneration shall be initiated at preset times of the
day. Manual regeneration shall be available at the stager.
shall consist of two mineral tanks with attached valve nest and one
brine tank with a brine director. Twin systems shall be controlled using
the ERCt 99-day electronic timer and two MPV1 stagers all housed in a
single NEMA 4 enclosure. Regeneration shall be initiated at preset times
of the day. Softeners run in parallel and are out of service only during
regeneration. Simultaneous regeneration is prevented by setting
different regeneration times for each unit. Manual regeneration shall be
available at the stager.
Alternating Demand Initiation.
Twin alternating systems shall consist of two mineral tanks with
attached valve nest and one brine tank with a brine director. Twin
alternating systems shall be controlled using the ERCd electronic
controller and an MPV3 stager housed in a single NEMA 4 enclosure.
Regeneration shall be initiated
based on the total quantity of water treated by the softener.
is in service and one in regeneration or standby. Manual regeneration
shall be available at the stager. Twin alternating systems provide a
continuous flow of softened water with no bypassing of unsoftened water
Tank Demand Initiation.
Regeneration shall be initiated
based on the total quantity of water treated by the softener. For pipe
sizes 3” and below, the VN Series uses PW series flow meters with the
ERCd controller, and MPV 1 or MPV3 stager. For 4” and 6” and larger
piping the VN series uses the PW 400S and 600S saddle mounted flow
meters with the WK520-84 controller, stagers and ARC cycle timers.
Twin alternating systems provide a continuous flow of softened water
with no bypassing of unsoftened water during regeneration.
standard soft water soap test kit shall be provided. A complete set of
instructions, including installation, loading, start-up, adjustments,
servicing, and a parts list shall be provided with the equipment.
A company that has
continuously manufactured water softeners for at least 10 years shall
construct the equipment.
Pressure gauge and test tap kit. A kit
containing two liquid filled, stainless steel pressure gauges with 2 ½”
Ø face, two brass ball valve sample taps with hose barb connections and
associated brass connection fittings shall be provided for mounting in
the 1/4" FNPT predrilled and tapped ports in the inlet and outlet