Brochure
3
56
1216
56
LOW LEAD PRE-ADJUSTABLE PRESSURE REDUCING VALVES
Pre-adjustable pressure reducing valve for residential and commercial
applications. DZR low lead "Ecobrass" body. Unique noise reducing
pressure balanced cartridge. Low friction anti-scale moving parts. High
fl ow seat design. Dial indicator with direct readout. Replaceable cartridge.
Integral stainless steel fi lter. Adjustment locking screw.
Max. working pressure: 300 psi (20 bar).
Max. working temperature: 180°F (80°C).
Pressure setting range: 15 — 90 psi (1 — 6 bar).
Factory setting: 45 psi (3 bar).
Certifi ed to: ASSE 1003, CSA B356, NSF61, NSF 372, Low Lead Laws
and listed by ICC-ES. Meets codes IPC, IRC & UPC for use in accordance
with the U.S. and Canadian plumbing codes.
535H
tech. broch. 01265
Code Description Flow gpm Lbs USD
535940HA ½" sweat 5.6 1.9 167.00
535941HA ½" sweat gauge 5.6 2.0 185.00
535340HA ½" NPT female 5.6 2.0 182.00
535341HA ½" NPT female gauge 5.6 2.1 200.00
535950HA ¾" sweat 10.0 2.2 181.00
535951HA ¾" sweat gauge 10.0 2.3 199.00
535350HA ¾" NPT female 10.0 2.3 196.00
535351HA ¾" NPT female gauge 10.0 2.4 214.00
535650HA ¾" Press 10.0 2.3 218.00
535651HA ¾" Press gauge 10.0 2.4 236.00
535960HA 1" sweat 15.9 2.9 240.00
535961HA 1" sweat gauge 15.9 3.0 258.00
535360HA 1" NPT female 15.9 3.0 256.00
535361HA 1" NPT female gauge 15.9 3.1 274.00
535970HA 1¼" sweat 25.5 5.6 530.00
535971HA 1¼" sweat gauge 25.5 5.7 548.00
535370HA 1¼" NPT female 25.5 5.7 544.00
535371HA 1¼" NPT female gauge 25.5 5.8 562.00
ASSE 1003
Operating principle
Operation of the pressure reducing valve is based on the balance between
two opposing forces:
1 the force of the spring towards
the opening of the valve
DOWNSTREAM
UPSTREAM
2 the force of the diaphragm
towards the closure of the valve
Operation without water flow
When the faucet is closed, the downstream pressure rises and pushes the
diaphragm upwards. As a result the slide closes the valve to the passage of
water and maintains the pressure constant at the calibrated pressure.
The slight difference in favor of the force exercised by the diaphragm, in
relation to that of the spring, causes the device to close.
Operation with water flow
When a faucet is opened on the water system, the force of the spring
becomes greater than that of the diaphragm; the shuttle moves downwards
opening the valve to the fl ow of water.
The greater the demand for water the lower the pressure under the
diaphragm with a resulting greater fl ow of water through the valve.
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0
60
20
40
80
100
0
1
2
5
6
7
3 4
psi
bar
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0
60
20
40
80
100
0
1
2
5
6
7
3 4
psi
bar
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0
60
20
40
80
100
0
1
2
5
6
7
3 4
psi
bar
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0
60
20
40
80
100
0
1
2
5
6
7
3 4
psi
bar
PVC jumper nipple with male union thread.
The length of the jumper nipple matches the
535H valve lay length, allowing the piping
to be completed prior to the installation of
valve and permitting quick change out from
the jumper to the valve.
Code Description Lbs USD
NA11304 Jumper nipple for 535H ½" series 0.1 21.50
NA11305 Jumper nipple for 535H ¾" series 0.1 23.70
NA11306 Jumper nipple for 535H 1" series 0.2 25.50
NA11307 Jumper nipple for 535H 1¼" series 0.3 27.50
May
2
May
2
May
016
May 2016