GENUINE MEGA
MEGA SPRAY HEAD VALVES
Originally patented in 1976, the MEGA Corp. Spray Head Valve is a combination water control
valve and fully adjustable fan spray nozzle that produces a flat, dense variable spray pattern.
The corrosion resistant, anti-clog, cast aluminum housing permits variable flow rates up to
700 gpm per spray head. Spray fan direction, volume, and width are easily adjustable by hand.
Mega spray head valves are available in both pneumatic and hydraulic models to accommodate any
heavy equipment application.
www.megacorpinc.com
Mega Spray Head Valves
GENUINE MEGA
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Mega Spray Head Valves
MEGA SPRAY HEAD VALVES
TABLE OF CONTENTS
» Mega Spray Head Valves (SHV)................................................................................................................................. 1-4
» Adjustable Base Plate & Adjusting Ring.................................................................................................................. 1-5
» Vertical Orientation.................................................................................................................................................... 1-5
» How Mega Can Help You Optimize Your Water Applications............................................................................... 1-6
» Spray Pattern Customization.................................................................................................................................... 1-8
» Horizontal Orientation and Fan Width.................................................................................................................... 1-8
» Spray Head Configuration Flow Rates (M-3 Water Pump).................................................................................... 1-9
» Approximate Spray Duration (M-3 Water Pump)................................................................................................... 1-9
» Spray Head Configuration Flow Rates (M-4B Water Pump).................................................................................. 1-10
» Approximate Spray Duration (M-4B Water Pump)................................................................................................ 1-10
» Mega Spray Head, 3 inch, Hydraulic, Stainless Steel, Breakdown, Part No.047062.......................................... 1-11
» Mega Spray Head, 3 inch, Hydraulic, Aluminum, Breakdown, Part No.025610................................................. 1-12
» Mega Spray Head, 3 inch, Pneumatic, Aluminum, Breakdown, Part No.300198............................................... 1-13
» FAQ Mega Spray Head Valves................................................................................................................................... 1-14
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Mega Spray Head Valves
MEGA SPRAY HEAD VALVES
Mega developed and patented its spray heads in 1976 and has continually improved them since.
Each Genuine Mega spray head is fully adjustable for fan volume, width, and direction. Precision water application
is a simple matter of proper selection of spray head settings and the number of spray heads activated.
Standard Mega spray head valves are constructed of a high-quality aluminum alloy metal and we also offer stainless
steel models. Our spray head valves are available in both pneumatic and hydraulic actuated models.
Mega Hydraulic Spray Heads
The Mega hydraulic spray head valve utilizes a custom-made, high quality,
heavy-duty, double-acting hydraulic cylinder to open and close the valve portion of
the spray head. This spray head is suitable for any heavy equipment prime mover,
and requires a hydraulic solenoid spray control system.
Mega Pneumatic Spray Heads
Air pressure produced by the prime mover's pneumatic system opens and closes
the pneumatic spray head valves. Air pressure forced into the valve closes the
spray head. Release of air pressure from the top spray head cavity allows a
spring to open the valve. This spray head is suitable for any heavy equipment
prime mover with a pneumatic system, and requires a pneumatic spray
control system.
MEGA RECOMMENDS THE USE OF
SPRAY HEADS FOR USE IN CORROSIVE APPLICATIONS
Mega Complete Stainless Steel Spray Heads
Want a spray head that lasts? Our complete stainless steel spray heads are best
suited to resist corrosion and abrasion by the harsh waters often found in mining
and construction environments. Stainless steel’s resistance to corrosion, durability
along with low maintenance make Mega stainless steel spray heads the ideal spray
head for you.
FULL COVERAGE!
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Mega Spray Head Valves
Advantages and Benefits of Mega Spray Heads
Mega Spray Heads Are FULLY Adjustable!
All Mega spray heads are adjustable and can be fine tuned to provide the optimal water distribution for a
specific application. This allows for high efficiency, reduced water consumption, and prevention of roadway
over watering.
Adjustable Base Plate
Adjusting Ring
Mega spray heads can be rotated 360°
on their base plate mounts to adjust
the horizontal direction of the discharge
spray for each individual spray head.
An adjusting ring allows for simple and
easy control over the discharge spray
flow and fan width.
Vertical Orientation
With the spray head set level with the ground, water exits at a 10° upward angle above horizontal, creating a
uniform, fully atomized fan of water. In hot and very arid climates, water can be quickly lost to evaporation as it
settles onto the hot ground. Optional swivels on spray heads allow them to be tilted downward to concentrate
the spray fan onto the ground. This is also useful for flushing and sweeping operations.
Additionally, Mega offers a Vertical Side Spray (VSS) option for both hydraulic and pneumatic spray heads. With
this option, a Mega spray head is mounted vertically on each side of the water tank. The resulting vertical fans of
water are ideal for spraying hillsides, piles, berms, and for reinforcing fire-fighting black lines.
Vertical Side Spray Heads.
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Mega Spray Head Valves
Overwatering Hazards
Recently, overwatering of mine haul roads has been the subject of increased study by mine planning and
safety. Many mines have improved their efficiency, lowered resource and equipment maintenance costs,
and improved the safety of their working conditions by employing water conservation practices.
Safety
Safety is the most important factor to consider. Overwatering of roadways decreases tire traction (skid
resistance), increases brake time, destabilizes fill slopes, and hastens erosion, all of which place the haulage
truck operators at a much higher risk for potentially fatal or traumatic haulage accidents. In wet road
conditions, haulage trucks cannot stop as quickly as on dry roads, and forceful application of brakes can
easily result in the truck skidding out of control and colliding with safety berms. Additionally, standing water
can soften road bases, potentially leading to washouts and collapsing of fill sections and slopes.
Water Waste
Water conservation is extremely important, particularly in drier climates where water is already a scarce and
precious resource. Many governments have implemented strict regulations concerning water usage, and
require mines to develop and adhere to a water conservation plan. These areas include (but are not limited
to) South Africa (through the Department of Water Affairs), California (through the California Department of
Conservation), Texas (through the Texas Administrative Code Title 30, Chapter 288), and most regions and
cities in Australia.
Labor and Resources
It has already been mentioned that overwatering degrades road quality. In order to maintain overwatered,
eroding haul roads, the roads must be serviced and repaired more frequently, at the cost of resources and
man-hours. The heavier a water truck’s spray is, the quicker its tank is emptied. This is perhaps the most
obvious consequence of overwatering. When using too much water, water trucks are required to return
to water fill stations more often, wasting both fuel and man-hours as well as subjecting the over-watered
roads to heavier traffic.
Tire Wear
A haul road in good, safe condition will have a compacted top layer of fine, cushioning particles protecting tires
from the larger, coarse, sharp rocks below. Overwatering erodes away this protective top layer, subjecting
tires to severe wear by the exposed coarse rocks. Not only is this costly in terms of tire replacement, but
also in terms of production rates and man-hours—a grader must resurface the road in order to repair it,
and the road cannot be used by haul trucks during this time.
Normal haul road with compacted top layer.
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Overwatered road washes away protective top layer
exposing rocks below.
HOW MEGA CAN HELP YOU OPTIMIZE YOUR
WATER APPLICATIONS
At Mega we know that every mine and construction-site
faces its own unique set of challenges, and that no single spray system configuration will work for all applications. To tackle this challenge, Mega spray systems are
designed to be versatile to meet any application requirements.
In order to optimize water distribution efficiency, many
environmental factors must be considered. The composition of the road, the grade of the slope, the wind, the
temperature and humidity of the air, and the desired water coverage must all be taken into account.
No other tank company has the depth of experience
and staff expertise available to serve our customers that
Mega offers. Please contact Mega Sales or Product Support to see how we can help you improve your water
spray applications.
We understand that our most precious natural resources are limited.
Water conservation is essential for reducing waste and for safe road
conditions, which is why we emphasize efficient water usage methods
and equipment.
by calling
at 1-800-345-8889
by going
@ www.megacorpinc.com
OrderOrder
Parts Parts
eithereither
by calling
Parts Parts
Sales Sales
at 1-800-345-8889
or by or
going
onlineonline
@ www.megacorpinc.com
7
Mega Spray Head Valves
Spray Pattern Customization
Mega spray heads can be adjusted to create a wide variety of spray patterns through horizontal rotation of the
spray head and adjustment of the flow rate and fan width of each individual spray head. This ability to orient and
adjust the flow of water from each spray head allows the operator to create the ideal spray pattern for nearly
any application.
Horizontal Orientation and Fan Width
Mega spray heads can be rotated on their base plate mounts to adjust the horizontal direction of the discharge
spray for each individual spray head, allowing the spray heads to be ‘aimed’ for optimal spray coverage. An
adjusting ring allows for further customization by providing control over the width of the spray fan. The adjusting
ring can be rotated to widen or narrow the spray between a 90° and a 10° fan opening.
Full Opening
A Mega spray head in the default
full (90°) opening setting emits a
wide, even fan of fine spray.
Spray Intensity
Narrow Opening
A Mega spray head adjusted to a
narrower opening width sprays a
more focused stream of water that
travels further.
An adjusting ring allows for simple and easy control over the spray intensity. A ⅜ inch tall opening (“heavy spray”
setting) will provide heavy, short-range spray appropriate for ground material that is very sandy or porous, or for
extremely hot and dry environments where a heavy lay-down of water is necessary to saturate the ground. The
1/4 inch opening provides a finer, longer-reaching spray ideal for precision watering and water conservation.
Heavy Spray
The “heavy” spray head opening is
⅜ inch tall. This setting provides
a very heavy spray of water with
reduced width and reach.
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Fine Spray
The “fine” spray head opening is
¼ inch tall. This setting results in a
finer spray of water with maximum
reach and width at high pump
speeds. This is the recommended
setting for most water distribution
applications.
Mega Spray Head Valves
Spray Head Configuration Flow Rates
(Mega M-3 Water Pump)
Total flow rates of different spray head configurations. The approximate total
flow rates in gallons/minute (left vertical axis) and liters/minute (right vertical
axis) of three possible spray head configurations. The “fine spray” opening is
¼ inches in height, and the “heavy spray opening” setting is ⅜ inches in height.
These flow rates were recorded on an MAC6 CAT730 with an M-3 Mega
water pump.
Approximate Spray Duration
(Mega M-3 Water Pump)
Total flow rates of different spray head configurations. The approximate total
flow rates in gallons/minute (left vertical axis) and liters/minute (right vertical
axis) of three possible spray head configurations. The “fine spray” opening is
¼ inches in height, and the “heavy spray opening” setting is ⅜ inches in height.
These flow rates were recorded on an MAC6 CAT730 with an M-3 Mega
water pump.
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Mega Spray Head Valves
Spray Head Configuration Flow Rates
(Mega M-4B Water Pump)
Total flow rates of different spray head configurations. The approximate total
flow rates in gallons/minute (left vertical axis) and liters/minute (right vertical
axis) of four possible spray head configurations. The “fine spray” opening is
¼ inches in height, and the “heavy spray opening” setting is ⅜ inches in height.
These flow rates were recorded on an MST8 CAT621K with an M-4B Mega
water pump.
Approximate Spray Duration
(Mega M-4B Water Pump)
Estimated spray duration for various capacity tanks with four different spray
head configurations. Spray duration in minutes is shown on the vertical axis.
The “fine spray” opening is ¼ inches in height, and the “heavy spray opening”
setting is ⅜ inches in height. These flow rates were recorded on an MST8
CAT621K with an M-4B Mega water pump.
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Mega Spray Head, 3 inch, Hydraulic, Stainless Steel
Part No. 047062
The Mega stainless steel hydraulic spray head is optimized for use in the most severe environments. The
stainless steel hydraulic spray head shares the same design as the Mega aluminum hydraulic spray head,
with the exception that all metallic parts that come into contact with water during use are stainless steel.
The Mega 3 inch hydraulic spray head valve is actuated by a long life double-acting hydraulic cylinder.
1
29
3 INCH DROP-IN ASSEMBLY
INCLUDES ITEMS:
6, 7, 8, 12, 13, 17, 21, & 22
28
2
3
27
4
26
5
25
24
6
9
10
7
23
8
11
22
21
12
13
14
ITEM
15
16
18
17
20
19
PART
NO.
DESCRIPTION
QTY
ITEM
PART
NO.
DESCRIPTION
QTY
047062
Spray Head, 3 inch, Hydraulic, Stainless Steel
1
16
354502
O-Ring, Base
1
1
306808
Hydraulic Cylinder, Stainless Steel
1
17
307321
*Stem Nut, Stainless Steel
1
2
046660
Upper Housing, Stainless Steel
1
18
045099
Lower Housing Base, Stainless Steel
1
3
354513
Set Screw, Cylinder
2
19
045679
Adjusting Ring, Stainless Steel
1
4
350011
Washer, 1.25 inches
1
20
306769
Cap Screw, 3/8-16 X 2 inch Stainless Steel
1
5
305304
Spring
1
21
306788
Adjusting Ring Knob
1
6
307320
*Stem Bolt, Stainless Steel
1
22
300208
*Diaphragm
1
7
307329
*Flat Washer
1
23
300215
*O-Ring, Stem
2
8
307330
*Bell Washer
1
24
351141
Nylon Tubing, 3/8 inch, 8 inch long tube
1
9
306661
Cap Screw, 5/16 X 1 1/4 inch Stainless Steel
8
25
307331
Acorn Nut, 1/2-20 Stainless Steel
1
10
355337
Lock Washer, 5/16 Stainless Steel
8
26
307360
Jam Nut, 1/2-20 Stainless Steel
1
11
355336
Flat Washer, 5/16 Stainless Steel
8
27
351082
Elbow, 1/4 inch, NPT-3/8 inch Tube
1
12
300210
*Upper Guide Disk
1
28
305294
Nut, Cylinder Retaining
1
13
300209
* Lower Guide Disk
1
29
307322
Drop-In Assembly
1
14
306764
Flat Washer, Eccentric, Stainless Steel
4
15
306805
Cap Screw, 3/8 UNC X 1/2 inch, Stainless Steel
4
*These parts are included in the Drop-in Assembly.
If illustration does not match your configuration please call product support at 505-345-2661 or 1-800-345-8889.
Order Parts either by calling Parts Sales at 1-800-345-8889 or by going online @ www.megacorpinc.com
11
Mega Spray Head, 3 inch, Hydraulic, Aluminum
Part No. 025610
The Mega 3 inch hydraulic spray head valve is actuated by a long life double acting hydraulic
cylinder. The Mega hydraulic spray head is designed for use in harsh conditions and/or where
there is no air supply available.
1
28
3 INCH DROP-IN ASSEMBLY
INCLUDES ITEMS:
6, 7, 8, 12, 13, 17, 21, & 22
27
2
26
3
25
4
24
5
10
23
6
9
7
11
22
8
21
20
12
13
14
ITEM
15
16
17
12
19
PART
NO.
DESCRIPTION
QTY
ITEM
PART
NO.
DESCRIPTION
QTY
025610
Spray Head, 3 inch, Hydraulic, Aluminum
1
16
354502
O-Ring, Base
1
1
306808
Hydraulic Cylinder, Stainless Steel
1
17
300214
*Stem Nut, Brass
1
2
025615
Upper Housing , Aluminum
1
18
300207
Lower Housing Base, Aluminum
1
3
354513
Set Screw, Cylinder
2
19
300216
Adjusting Ring, Aluminum
1
4
350011
Washer, 1.25 inches
1
20
302912
Adjusting Ring Knob
1
5
305304
Spring
1
21
300208
*Diaphragm
1
6
049199
*Stem Bolt, Brass
1
22
300215
*O-Ring, Stem
2
7
307329
*Flat Washer
1
23
351141
Nylon Tubing, 3/8 inch, 8 inch long tube
1
8
307330
*Bell Washer
1
24
307331
Acorn Nut, 1/2-20 Stainless Steel
1
9
355335
Cap Screw, 5/16 X 1 1/4 inch
8
25
307360
Jam Nut, 1/2-20 Stainless Steel
1
10
355337
Lock Washer, 5/16 Stainless Steel
8
26
351082
Elbow, 1/4 inch, NPT-3/8 inch Tube
1
11
355336
Flat Washer, 5/16 Stainless Steel
8
27
305294
Nut, Cylinder Retaining
1
12
300210
* Upper Guide Disk
1
28
300409
Drop-In Assembly
1
13
300209
*Lower Guide Disk
1
14
355295
Flat Washer, Stainless Steel
4
15
355294
Cap Screw, 3/8 X 3/4 inch
4
*These parts are included in the Drop-in Assembly.
18
If illustration does not match your configuration please call product support at 505-345-2661 or 1-800-345-8889.
GENUINE MEGA
Mega Spray Head, 3 inch, Pneumatic, Aluminum
Part No. 300198
The Mega pneumatic spray head is actuated by pressure regulated air supplied by the tractor.
The anodized and hardened aluminum provides superior protection from corrosive water.
22
3 INCH DROP-IN ASSEMBLY
INCLUDES ITEMS:
2-4,10-12,17,18
1
21
20
19
2
3
5
6
4
18
17
7
8
9
10
11
ITEM
13
12
14
15
16
PART
NO.
DESCRIPTION
QTY
ITEM
PART
NO.
DESCRIPTION
QTY
300198
Spray Head, 3 inch, Pneumatic, Aluminum
1
13
300215
* O-Ring
2
1
300206
Upper Housing , Aluminum
1
14
354502
O-Ring, Base
1
2
049199
*Stem Bolt, Brass
1
15
300207
Lower Housing Base, Aluminum
1
1
3
307329
*Flat Washer
1
16
300216
Adjusting Ring, Aluminum
4
307330
* Bell Washer
1
17
302912
Adjusting Ring Knob
1
5
355335
Cap Screw, 5/16 X 1 1/4 inch, Stainless Steel
8
18
300208
*Diaphragm
1
6
355336
Flat Washer, 5/16 Stainless Steel
8
19
300468
Quick Discharge Valve, Pneumatic
1
7
355337
Lock Washer, 5/16 Stainless Steel
8
20
352467
Nipple, Quick Discharge Valve, Pneumatic
1
8
300210
* Upper Guide Disk
1
21
300213
Spring
1
9
300209
*Lower Guide Disk
1
22
300409
Drop-In Assembly
1
10
355295
Flat Washer, Stainless Steel
4
*These parts are included in the Drop-in Assembly.
11
355294
Cap Screw, 3/8 X 3/4 inch
4
12
300214
*Stem Nut, Brass
1
If illustration does not match your configuration please call product support at 505-345-2661 or 1-800-345-8889.
Order Parts either by calling Parts Sales at 1-800-345-8889 or by going online @ www.megacorpinc.com
13
Mega Spray Head Valves
Mega Spray Head FAQ Section
What does SHV and VSS mean?
SHV stands for “Spray Head Valve” and VSS means "Vertical Side Spray".
My spray pattern has a blank dry spot in it. What should I do to correct this?
Mega spray heads have an adjustable ring that changes the flow rates and direction of the spray. Use this adjusting
ring to control the intensity and geometry of your spray pattern. If that does not work, check the spray head
assembly for debris and damage to the guide disc or lower housing. Contact Mega Product Support for assistance
and more information.
Sample of debris caught
inside & under the drop-in
assembly of SHV.
Can I still order the Pneumatic 2 inch spray heads?
The Mega pneumatic 2 inch SHV's have been discontinued. Mega offers an aluminum pneumatic 3 inch SHV for
pneumatic systems.
All of these customization options are kind of overwhelming. Does Mega offer training of any sort?
Yes! Mega offers on-site operator training. We can send a Product Support Representative to your site to teach and
demonstrate the Mega spray system installation, adjustments, and best practices. If you are interested in our on-site
training, contact the Mega Product Support Group for pricing information and schedule availability.
We purchased a water tank without vertical side spray heads, can they be added?
Yes, Current MEGA water tanks can be upgraded to control up to 8 spray heads and 3 butterfly valves
(Non DiSCS® systems), the DiSCS® systems can control 6 spray heads and 3 butterfly valves. Contact the MEGA
Product Support group at 505.345.2661 if you have any questions.
Please make sure to have your tank serial number to see if your control system is capable of supporting these
additional features. Location of our Mega serial and model numbers can be found on our website at
http://www.megacorpinc.com/parts/serial.asp
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For Your Business
GENUINE MEGA
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11-2017 Mega Spray Head Valves
® Mega Corp. Inc. All Rights Reserved
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