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  Two-Way
Flow Altitude Valve
Model
106 or 206-A-Type 1
The
valve shall control water level in elevated tanks,
standpipes or storage reservoirs. The valve closes
drip tight on high reservoir level. It shall open
to permit return flow or filling when the supply
pressure falls below the reservoir head or the
level falls a predetermined, non-adjustable amount.
Specifications
Model 106 or 206-A-Type 1 Two-Way Flow Altitude
Valve with Fixed Drawdown
The
valve shall be a single chambered, Singer model
106 (206) –A-Type 1, Two-way Flow, Altitude
Valve, size ____” (mm), ANSI Class 150 flanged,
globe (angle) style, with ANSI B16.42 pressure
rating of 250psi, suitable for controlling water
level into and preventing overflow of elevated
tanks, standpipes or storage reservoirs. The valve
shall close drip tight at a predetermined maximum
water level and opens to fill the reservoir when
water level drops or opens to allow return flow
when supply pressure drops.
The
main valve shall be constructed of ASTM A536 ductile
iron and coated inside and out with an NSF61 approved
fusion epoxy. The stem and seat ring shall be
constructed of stainless steel. The valve shall
come complete with a precise and accurate model
301-4 altitude pilot, spring range 10 to 60 ft
(4 to 20, 40 to 125), factory set at _____ ft,
that closes at a predetermined maximum level and
opens when the reservoir level or supply pressure
drops a non-adjustable amount. The pilot system
shall be assembled according to Schematic A0412.
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 closes drip tight on high
reservoir level. It shall open to permit return
flow or filling when the supply pressure falls
below the reservoir head or the level falls a
predetermined, non-adjustable amount.
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
valve shall include a model X107 visual position
indicator assembly. 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
A0412.
The
pilot system shall come complete with the following
components:
a) Model 301-4 altitude pilot valve, spring range
10 to 60 (4 to 20, 40 to 125), set at ____ ft.
b) Dual scale altitude gauge
c) Brass needle valve for closing speed control.
d) Pilot system strainer with 40 mesh stainless
steel screen and a built-in blowdown/cleaning
port.
e) Isolating ball valve at inlet, bonnet and remote
sensing connections.
f) Model 10 pilot check valves to allow reverse
flow.
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