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91 and 95 D Impact Rotor Series Specifications
The full- or part-circle sprinkler shall be an impact drive
rotor capable of covering a _____ (units) radius at a base
pressure of _____ (units) and a discharge rate of _____ (units).
The rotor shall be installed with a number _____ drive nozzle
and a number _____ range nozzle that shall be _____ in color
for ease of identification.
The part-circle sprinkler shall have an adjustable arc coverage
of 20Þ to 340Þ. Arc adjustment can be performed
with or without the rotor in operation and shall be done by
hand. The part-circle rotor shall rotate through a 180Þ
arc in one and a half minutes or less. Rotation through 360Þ
shall be three minutes or less for the full-circle sprinkler.
The sprinkler shall be fully serviceable from the top without
the need to isolate the rotor. The internal assembly shall
be retained in the case by a plastic snap ring. The valve
seat shall be replaceable from the top. The rotor shall have
a bearing guide that seals against the riser when it is fully
raised. The retract spring shall be of strong stainless steel
for positive pop-down.
The cover of the rotor shall indicate the model, identify
the installed nozzle size and have an arrow to indicate the
position of the nozzle, and shall provide a positive seal
against debris when the rotor is not in operation. The nozzle
shall be tested per ASAE S398.1 and be verified to deliver
scheduling coefficient of 1.2 or less and a Christiansen coefficient
of uniformity of 90% or greater at the specified spacing.
The rotor body shall be molded of engineering grade plastic
and shall have a double-wall construction female (NPT or BSP)
bottom inlet.
The sprinkler shall be as manufactured by Rain Bird Sprinkler
Mfg. Corp., Glendora, California.
Optional Feature—Electric Valve in Head (e.g., 91DR
or 95DR)
The sprinkler shall have a 24 VAC 50/60 cycle solenoid actuated
normally closed control valve in the base of the case. The
rotor shall have a pressure regulator which is adjustable
from the top using a small flat blade screwdriver. The rotor
shall have a top serviceable selector that allows the unit
to be operated manually, in automatic mode or shut off entirely.
The rotor case shall have a top diameter of 10.1" (25,7
cm) and an overall height of 14.5" (37,1 cm). The case
shall have a 1.5" (3,8 cm) NPT or BSP threaded inlet.
Optional Feature—Normally Open Hydraulic Valve in Head
(e.g., 91DH or 95DH)
The sprinkler shall have a normally open hydraulic control
valve in the base of the case.
The rotor case shall have a top diameter of 10.1" (25,7
cm) and an overall height of 14.5" (37,1 cm). The case
shall have a 1.5" (3,8 cm) NPT or BSP threaded inlet.
Optional Feature—Stopamatic Valve in Head (e.g., 91DS
or 95DS)
The sprinkler shall have a Stopamatic valve in the base of
the case. The valve shall hold back at least 15 ft. or 4,6
m. of elevation.
The rotor case shall have a top diameter of 10.1" (25,7
cm) and an overall height of 14.5" (37,1 cm). The case
shall have a 1.5" (3,8 cm) NPT or BSP threaded inlet.
