252
Series Valves
BiddingSpecifications
(cont.)
Recommended
exceed 11.0 PSI on hydraulic, angle
valves; 13.5 PSI on hydraulic, globe valves; manufactured, qualified and released in
The valve shall be developed,
Installation Instructions
9.0
15.0
PSI on electric, angle valves; and
PSI on electric, globe valves. For 2"
models, friction loss at 180 GPM shall not
the USA. The valve, model number
__________________________, shall be
manufactured by The Toro Company,
In all installations, it is advantageous
to mount valves in a valve box. Logically,
if mounted in valve boxes, they can be
found, accessed and maintained easily.
Instructions should include the use of
clean aggregate to fill the bottom of the
box, and keeping valve box locations
away from structures, potential
exceed 6.0 PSI on hydraulic, angle valves; Irrigation Division, El Paso, Texas, USA.
11.0
PSI on hydraulic, globe valves; 7.0 PSI
on electric, angle valves; and 11.0 PSI on
electric, globe valves. The burst pressure
safety rating shall be 750 PSI.
An effluent flow-control knob and BSP
threads shall be available options.
252
Friction Loss*
hardscaping features (such as sidewalks)
and large planting locations. Additionally,
Flow Hyd. Hyd. Elec. Elec. Elec. valve box locations generally should be
GPM
1
1
⁄
2
"
2"
1"
1
1
⁄
2
"
2"
Electric Models
A—Angle
G—Globe
A
G
A
G
A
G
A
G
A
G
in shrub beds and at right angles to
structure locations. Valves can be direct-
buried, but should be specified with a 4"
PVC sleeve and a Toro valve cover
(Part No. 850-00) to allows access to the
top of the valve. Valve boxes are highly
recommended for larger sizes (2") and
pressure-regulating models.
The normally open hydraulic option is
particularly appropriate for dirty water
applications such as effluent water use.
With these valves, the main flow water
supply is not utilized as a source for
closing the valve. The bonnet pressure
The valve shall be normally closed by
internal water pressure. A [18"/24"]
solenoid lead wire shall be attached to a
removable 24 V a.c., 50/60 Hz solenoid
with a waterproof coil. The valve shall
have a self-cleaning, stainless-steel
metering pin to protect bleed ports and
purge contaminants.
5
2.0
3.0
10
3.5 4.0
20
4.5
4.5
5.0
6.0
25
1.0
1.0
1.5
1.5
30
1.0 1.0
5.0 7.0 1.0 1.5
40
1.5
2.0
7.5 9.5 1.5 2.0
Pressure-Regulating Models
The pressure regulator shall be a
manually operated, locking type and shall
regulate precisely over a 15-125 PSI range.
The regulator shall maintain the set
pressure within 3 PSI (with a minimum
50
1.5 3.0
2.0 3.0
60
3.0
4.0
4.0
5.5
1.0
1.0
1.5
2.0
3.0
3.0
4.0
5.0
1.0 2.0
1.0 2.0
70
5.0 7.0 2.0 2.5 on a normally open valve is supplied
independently through a filtered source
from the controller.
Hydraulic valve control tubing should
be rated for a maximum continuous
80
5.0 6.5 1.5 2.0
7.0 10.5 2.0
11.0 13.5 3.0 5.0
100
120
150
170
3.5
7.0 11.0 3.0 3.5
10
PSI differential between inlet and
outlet). The valve shall contain a built-in
Schrader-type valve fitting for attaching a
pressure gauge. The valve shall have a
removable, self-flushing, 120-mesh,
stainless-steel filter screen.
9.0 15.0 4.0 5.5
5.0 8.0
5.0
8.0
working pressure of 150 PSI with
1
⁄" O.D.
4
6.0 10.0
6.0 11.0
6.0 10.0
and
1
⁄8" I.D. Tubing connections should be
180
7.0 11.0
brass compression coupling or tees, and
should be self-aligning.
Notes:
Normally Open Hydraulic Models
The normally open valve diaphragm
chamber shall be isolated from the water
supply and shall be operated by
inline-filtered water from the controller.
Quarter-inch control tubing shall enter the
valve at the hydraulic adapter assembly.
The pressure-regulating model may be
used to reduce high available pressure
due to a change in elevation or where a
lower lateral line pressure is required.
Electric control valve instructions
should specify direct-burial wire, utilizing
different colors for hot hook-up to each
remote location and one color for the
common wire to all valves.
1.
For optimum performance when designing a
system, calculate total friction loss to ensure
sufficient downstream pressure.
2. For optimum regulator performance, size
regulating valves toward the higher of flow
ranges.
*
Contamination-resistant valves are electric only.
Pin-Type Hydraulic Models
The valve shall have a normally closed
diaphragm chamber. Supply water is
metered from the inlet through the orifice
plate. The controller selector valve shall
block the discharge from the controller
tube for normally closed operation.
Watertight splice connections are
absolutely essential for proper valve
operation. For future service
considerations, expansion loops at each
valve location are recommended.
Contamination-Resistant Models
The valve shall have a removable,
self-flushing, 120-mesh, stainless-steel
filter screen.
SEPTEMBER 2000
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| Categories | Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro 252 Series |
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| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
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