MARK II SERVO TANK FILLING VALVES Fast and Easy

MARK II SERVO TANK FILLING VALVES
Philmac’s Australian made Mark II servo tank filling valve is designed to deliver high
volumes of water very quickly. Due to the unique servo action, the valve requires only a small float, which makes them
ideal for confined spaces.
The unique design of the secondary servo action guarantees shut off at extremely high
pressure.
Manufactured from high grade materials the Mark II servo tank is suitable for a range of
applications such as fire service water tanks.
APPLICATIONS
Agriculture: Water tanks on bore schemes.
Plumbing: Water tanks for drinking water and fire service tanks
BENEFITS
Fast and Easy Installation
Complete Security
High Performance
• Minimum Space Required for
Installation: Based on a servo action
the body has a secondary chamber
which assists the lever/float assembly
in closing the valve. This reduces the
length of lever arm and float size that
would otherwise be required to close
at high pressures. With a compact body
design it makes them perfect for tight
applications such as fire service tanks.
• Servo Sealing Action: By allowing water
into the top chamber of the body it
provides an additional or secondary
force to the piston to assist the lever/
float assembly and provide complete
shutoff.
• Manufactured from DZR brass: The
brass components in Philmac servo
tank filling valves are manufactured from
dezincification resistant (DZR) brass. This means the brass is resistant in soil
and water environments to corrosion
involving the loss of zinc leaving a
residue of spongy or porous copper.
• BSP Inlet/Outlet Threads: The Industrial
and Plumbing sectors use British
Standard Pipe (BSP) threads as a
standard. Philmac also uses these thread
types across the valve range to ensure
compatibility with other threaded fittings
making installation easy.
• Hexagonal Inlet/Outlet: Both the inlet
and outlet are hexagonal in shape to
make it easy to use a spanner or pipe
wrench for installation.
• Easy Disassembly: The valves have been
designed allowing easy replacement of
the seals and O-rings. Simply remove
the pivot pin, disconnect the lever arm
assembly and remove the hexagonal
seat bottom to allow the piston
assembly to slide out and access the
seals and O-rings.
18 Valves TECHNICAL MANUAL
• Corrosion Resistant: With a gun metal
body, 316 stainless steel seat, DZR
brass components, polypropylene split
ring, nitrile O-rings and seals, the valve
is manufactured using high corrosion
resistant materials.
• Float Security: The lever arm has been
designed so that the copper float slides
over the lever arm and is secured with
a cotter pin to prevent it coming loose. In addition, by sliding the float onto the
lever arm it ensures force is applied to
the complete float not just a socket on
the end. This ensures reliable operation.
• Approvals: All valves comply with
Australian/New Zealand Standard 4020
which means the valves are suitable for
use with drinking water.
• High pressure shutoff: Servo tank
filling valves are rated to a pressure
of 2000 kPa (290psi) or 20 bar (static
shutoff) at 200 Celsius to meet the
requirements of high pressure systems.
Complete Coverage
• Wide range: The range of servo tank
filling valves is comprehensive and includes
1½", 2" and 3" (DN40, 50 and 80).
S E R V O TA N K
SERVO TANK
FILLING VALVES
Lever arm included
STANDARDS & TESTS
Philmac’s range of servo tank filling valves
are designed to comply with the following
standards and undertake a range of
tests to ensure they comply with these
standards.
Standards
Tests
AS/NZ 4020: Testing of products for use
in contact with drinking water.
Shut Off Test: Valves are tested for shut
off against a hydrostatic water pressure of
2000 kPa (290 psi) or 20 bar.
AS 1722.1: Pipe threads of Whitworth
form part 1: sealing pipe threads.
ISO7: Pipe threads where pressure tight
joints are made on the threads.
Strength Test: Valves are tested for
adequate strength for their intended
application. This includes testing at the
maximum recommended operating
temperature and a pressure of 3000 kPa
(435 psi) or 30 bar.
Valves TECHNICAL MANUAL 19 MARK II SERVO TANK FILLING VALVES OPERATION & INSTALLATION INSTRUCTIONS
The Philmac servo tank filling valves operate by opening and closing a piston against a seat through the action of a lever arm attached to
a float. The lever arm is interconnected to the secondary piston via a cam.
As the water level drops, the float and lever arm move in a downward direction and the secondary piston lifts allowing water in the top
chamber to pass downstream. The secondary piston in interconnected to the main piston and as it lifts so does the main piston which
moves it away from the seat and opens the valve.
When the water level rises, the float and lever arm move in an upwards direction and the secondary and main piston moves towards
the seat until it sits firmly against the seat. Water then enters the top chamber by passing along the side of the main piston and through
a small slot in the piston split ring. By doing this, water pressure is applied to the main piston. This secondary or servo action combined
with the action of the float and lever arm ensures the valve shuts off.
1. Apply PTFE tape or approved sealant
to the inlet thread ensuring sufficient
is applied to ensure a watertight seal.
2. Screw into female thread by hand
until firm.
3. Using a pipe wrench or multigrips
on the hex of the valve, screw it into
the female thread until tight. Where
necessary ensure the female thread is
held stationary to avoid it from moving.
4. Thread the lever arm through a 10”
(255 mm) copper float (ball) and
tighten.
5. Fit the split (cotter) pin on the end
of the arm to prevent it from coming
loose.
6. Remove the pivot pin from the body
and fit the lever arm then ensure the
pivot pin tabs are flared outward by
using a small screwdriver.
Schematic diagram showing a typical installation
with either a baffle plate to minimise float
bounce or a pipe to direct water away from
the float and prevent float bounce.
HOLES DRILLED IN PIPE
FOR AIR GAP
BAFFLE PLATE
PIPE WITH 45º ELBOW
20 Valves TECHNICAL MANUAL
SYSTEM DESIGN CONSIDERATIONS
Operating temperature: Connection is
cold water (less than 200C) rated. Maximum Operating Pressure: 3500 kPa
(435 psi) or 35 bar.
Weathering: All non-ferrous materials
are protected from the affects of UV.
Sealing threads: Philmac recommends
sealing threads with PTFE tape. When
being fitted to a metal thread an
approved metal sealant can be used.
Air Gap: When connecting to drinking
water the installation should comply with
the relevant air gap standards to prevent
back siphonage.
Flow Rates (L/min)
Inlet
Pressure
(kPa)
Inlet Size
1 ½”
(DN40)
2”
(DN50)
3”
(DN80)
100
420
600
1440
150
510
720
1680
200
600
840
1960
250
670
960
2170
300
730
1020
2290
350
770
1080
2460
400
800
1140
2580
450
830
1220
2700
500
900
1300
2820
Valve selection should be directly related to demand and not to pipe size. The flow
required should be determined at a given dynamic pressure and then the valve
should be selected from the table above.
Philmac’s servo tank filling valves are
primarily designed to convey water. However there may be occasions where
the water contains chemicals and/or
alternative fluids need to be controlled. The
following table is provided as a guide only
for the compatibility of various chemicals
and alternative fluids to Philmac servo
tank filling valves. The mixing together of
chemicals may affect the compatibility.
Chemical
Acetic acid (10%)
Acetic acid (50%)
Alcohol (ethanol)
Ammonium nitrate
Antifreeze
Brine
Calcium carbonate
Calcium chloride
Calcium nitrate
Calcium sulphate
Chlorine water
Citric Acid
Copper Sulphate >5%
Diesel (fuel)
Ethyl alcohol (ethanol)
Hydrochloric acid (10%)
Hydrochloric acid (30%)
Kerosene
Lubricating oils (not synthetic)
Magnesium nitrate
Magnesium sulphate
Mineral oils
Nitric acid (10%)
Nitric acid (40%)
Olive oil
Orange juice
Petrol
Phosphoric acid (85%)
Drinking water
Potassium chloride
Potassium nitrate
Potassium sulphate
Sodium bicarbonate
Sodium hypochlorite (<10%)
Sulphuric acid (10%)
Sulphuric acid (30%)
Urea
Zinc nitrate
Zinc sulphate
Compatibility
N
N
N
N
R
R
N
N
N
N
R
N
N
N
R
R
R
R
N
N
N
R
N
R
N
N
N
R
N = Not Recommended
R = Resistant
Empty Cell = No data available
Note recommendations based on fluids at 200 C or less
Valves TECHNICAL MANUAL 21 SERVO TANK
FILLING VALVES
Threads: All threads are BSP (Whitworth
form).
CHEMICAL RESISTANCE
MARK II SERVO TANK FILLING VALVES MATERIAL & COMPONENTS
PIVOT PIN
CAM
LEVER
BODY CAP
COTTER PIN
O-RING
SEAT
BODY
PISTON
SPLIT RING
SEAT RETAINER
SEAT WASHER
PISTON - MAIN
INLET
SCREW RETAINER
SEAT WASHER
SEAT RETAINER
O-RING
SEAT BOTTOM
Servo Tank Filling Valve
Size
Nominal
Size
Part
Number
Body
Body Cap
Pivot Pin
Cam
Lever
Cotter Pin
Seat
Bottom
1½”
DN40
90381500
Gun Metal
DZR brass
DZR brass
DZR brass
DZR brass
DZR brass
DZR brass +
316 S/S
2”
DN50
90381600
Gun Metal
DZR brass
DZR brass
DZR brass
DZR brass
DZR brass
DZR brass +
316 S/S
3”
DN80
90381700
Gun Metal
DZR brass
DZR brass
DZR brass
DZR brass
DZR brass
DZR brass +
316 S/S
Size
Nominal
Size
Part
Number
Piston Main
Piston
Seat
Retainer
Screw
Retainer
Seat Seal
O-ring
Split Ring
1½”
DN40
90381500
DZR brass
DZR brass
DZR brass
DZR brass
Nitrile
rubber
Nitrile
rubber
Polyethylene
2”
DN50
90381600
DZR brass
DZR brass
DZR brass
DZR brass
Nitrile
rubber
Nitrile
rubber
Polyethylene
3”
DN80
90381700
DZR brass
DZR brass
DZR brass
DZR brass
Nitrile
rubber
Nitrile
rubber
Polyethylene
22 Valves TECHNICAL MANUAL
MARK II SERVO TANK FILLING VALVES RANGE & DIMENSIONS
SERVO TANK
FILLING VALVES
B
C
A
H
G
E
D
F
K
J
I
Size
(A)
Nominal
Size
B
C
D
E
F
G
H
I
J
K
1 ½”
DN40
110
165
70
1½”
760
255
260
½“ BSW
750
135
2”
DN50
110
170
80
2”
890
255
260
½“ BSW
860
135
3”
DN80
145
225
110
3”
1040
255
410
½“ BSW
1000
135
All dimensions in millimetres unless otherwise stated
Valves TECHNICAL MANUAL 23 
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