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  Modulating
Float Control Valve
Model
106 & 206 F-Type 4
The
valve shall control water level in elevated tanks,
standpipes or storage reservoirs. The valve shall
modulate the flow into the reservoir to maintain
a constant level. The valve shall close drip tight
at the maximum level. The proportional closing
speed control shall prevent surging.
Specifications
Model 106 or 206-F-IV Modulating Float Valve
The
valve shall be a single chambered, Singer model
106 (206) –F-Type 4, Modulating Float Control
Valve, size ____” (mm), ANSI Class 150 (300)
flanged, globe (angle) style, with ANSI B16.42
pressure rating of 250 (600) psi, suitable for
controlling water level and modulating flow into
elevated tanks, standpipes or storage reservoirs.
The
main valve shall be constructed of ASTM A536 ductile
iron and coated inside and out with an NSF61 approved
fusion epoxy. The valve shall include an Internal
Needle Stem Valve (INSV) to provide proportional,
but non-adjustable, closing speed. The stem and
seat ring shall be constructed of stainless steel.
The valve shall come complete with a bronze pilot
valve suitable for remote installation, and a
plastic float (copper). The pilot system shall
be assembled according to Schematic A0608.
Prior
to shipment, the standard tests shall include
a pressure test and a full function, operational
test. The entire valve shall be covered by a three
(3) year limited warranty against defects in materials
and workmanship. The stainless steel seat ring
shall be covered by Singer Valve’s exclusive
LIFETIME replacement warranty.
Function:
The
valve shall be hydraulically operated, globe (or
angle) pattern and suitable for controlling water
level in elevated tanks, standpipes or storage
reservoirs. The valve shall modulate the flow
into the reservoir to maintain a constant level.
The valve shall close drip tight at the maximum
level. The proportional closing speed control
shall prevent surging.
Main
Valve Characteristics:
All
valves shall have a single operating chamber separated
from the flowing media by the diaphragm(s). The
pressure containing components shall be constructed
of ASTM A536-65/45/12 ductile iron, rated to ANSI
Class 150 or Class 300 maximum operating pressures
of 250 psi and 600 psi respectively. Every valve
shall come internally lined and externally coated
with an NSF61 approved fusion epoxy coating. All
repairs shall be possible without removing the
valve from the line.
The
inner valve assembly shall be top and bottom guided
by means of easily replaceable bearing bushings.
The inner valve assembly shall be the only moving
part and securely mounted on a stainless steel
stem with wrench flats to simplify assembly. The
stem shall include the Internal Needle Stem Valve
(INSV) for proportional closing speed control.
The inner valve assembly shall act in the vertical
plane and seal perpendicular to the seat.
For
smooth “frictionless” motion, actuation
shall be by diaphragms, either flat or rolling
type, constructed of nylon fabric, bonded with
synthetic rubber. The diaphragms shall not be
used as a sealing surface. All diaphragms shall
meet or exceed a Mullen Burst Test of 1500 psi.
No lip seals, o-rings or packing may be used to
seal the actuator.
The
seating shall consist of a mechanically held,
rectangular cross-section, synthetic rubber resilient
disc and an erosion resistant, stainless steel
stationary seat. The seat shall be bolted into
place and have a warranty for the life of the
valve. No special tools will be required to work
on any part of the valve.
The
valve cover shall have a separate removable spring
giving access to the stem for alignment check
and ease of assembly.
Each
valve shall be tested prior to shipment. The shop
tests shall include a pressure test and a functional
operational test. Pilots shall be preset as specified.
All valves shall come with a three (3) year warranty
and an exclusive LIFETIME replacement warranty
for the stainless steel seat.
Pilot
System Characteristics:
The
main valve shall be complete with a fully functional
pilot system assembled according to Schematic
A0608.
The
pilot system shall come complete with the following
components:
a) Bronze pilot valve with a 5” diameter
plastic (copper) float and brass connecting rod,
suitable for remote installation at the maximum
reservoir level..
b) Brass needle valve for opening speed control
and to isolate the bonnet discharge connection.
c) Pilot system strainer with 40 mesh stainless
steel screen and a built-in blowdown/cleaning
port.
d) Isolating ball valve at inlet connection.
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