Product Overview

ManualsBrandsCaleffi ManualsHeating Supplies1-1/2" Press Pressure Reducing Valve (Low Lead, Pre-adjustable)

Product range

5353H series

Pre-adjustable pressure reducing valve with or without pressure gauge and NPT female threaded union connections........................... .

sizes ½", ¾", 1", 1¼" , 1½" & 2"

5355H series

Pre-adjustable pressure reducing valve with or without pressure gauge and union PEX expansion connections..................size

¾" & 1"

5356H series

Pre-adjustable pressure reducing valve with or without pressure gauge and union press connections.....................................................

sizes ¾", 1" & 1¼", 1½" & 2"

5357H series

Pre-adjustable pressure reducing valve with or without pressure gauge and union PEX crimp connections.......................sizes

¾" & 1"

5359H series

Pre-adjustable pressure reducing valve with or without pressure gauge and union sweat connections....................................................

sizes ½", ¾", 1" & 1¼", 1½" & 2"

NA5358H series

Pre-adjustable pressure reducing valve with or without pressure gauge, body only, connections field installed.......................................

sizes ½", ¾", 1" & 1¼", 1½" & 2"

01265/21 NA

PresCal™

Pre-adjustable pressure reducing valves

535H series

Function

Pressure reducing valves are devices which, when installed on water

systems, reduce and stabilize the pressure of the water entering from

the water supply main. This pressure, in general, is too high and

variable for domestic systems to operate correctly.

The 535H series pressure reducing valves, ideal for residential and

commercial applications, feature a dial indicator with direct readout

allowing easy pressure pre-adjustment. After installation, the valve will

control at the pre-adjusted pressure setting.

The valve is constructed of DZR low-lead forged brass and incorporates

a unique noise reducing and high flow seat design, is easily serviced with

a replaceable cartridge and has an integral stainless steel filter (35 mesh),

suitable for water systems that may contain sediment and debris.

The valve is ICC-ES certified to ASSE 1003, CSA B356, NSF/ANSI/CAN

61 (180°F/82°C Commercial Hot), NSF 372, low lead laws and listed by

ICC-ES. It meets codes IPC, IRC, UPC and NPC for use in accordance

with the US and Canadian plumbing codes. Plenum rated: compliant with

the requirements of standard UL 2043, without the outdoor protective

cover.

003

FM 21654

Technical specications

Materials - body: DZR low-lead forged brass

CR EN 1982 CC768S

- housing: glass reinforced nylon PA66M40/1

- outdoor protective cover: UV stablized ABS, gray

- control stem and moving parts:

DZR low-lead brass CR EN 12164 CW724R

- diaphragm: peroxide-cured EPDM

- seals: peroxide-cured EPDM

- compensation piston rings: PTFE

- ﬁlter: stainless steel EN 10088-2 (AISI 304)

- seat: stainless steel EN 10088-3 (AISI 303)

- shuttle cartridge: PPSG40

Performance

Suitable ﬂuids: water

Max. working pressure: 300 psi (20 bar)

Downstream pressure setting range: 15 - 90 psi (1 - 6 bar)

Factory setting: 45 psi (3 bar)

Maximum working temperature: 180°F (80°C)

Flow rates at 6 fps (gpm): ½": 7.3; ¾": 12.5; 1": 19.0; 1¼": 34.0;

1½": 44.0; 2": 70.0

Pressure gauge scale: 0 - 100 psi (0 - 7 bar)

Filter mesh size: 0.51 mm (35 mesh)

Certications

1. Complies with codes IPC, IRC, UPC and NPC. ICC-ES certified to

ASSE 1003, CSA B356 (R2015).

2. Complies with NSF/ANSI/CAN 61 (180°F/82°C Commercial Hot),

as certifed by ICC-ES, file PMG-1356.

3. Complies with NSF/ANSI 372, Drinking Water System

Components- Lead Content Reduction of Lead in Drinking Water

Act, California Health and Safety Code 116875 S.3874, Reduction

in Drinking Water Act, Vermont Act 193 - The Lead in Plumbing

Supplies Law and Maryland’s Lead Free Law HB.372, as certified

by ICC-ES, file PMG-1360.

4. PEX crimp fittings certified to ASTM F 1807.

5. PEX expansion fittings certified to ASTM F 1960.

6. Plenum rated: Evaluated in accordance with the standard UL

2043 and was found compliant with the standard's requirements

(This does not pertain to the outdoor protective cover)

Connections

Main connections: ½", ¾", 1", 1¼", 1½" & 2" NPT female and

sweat union

¾", 1", 1¼", 1½" & 2" press union

¾" & 1" PEX expansion union

¾" & 1" PEX crimp union

Pressure gauge connection: 1/8" NPT female

Replaces 01265/19.1 NA

NSF/ANSI/CAN 61

All models come with UV outdoor

protective cover as pictured here.

Summary of content (8 pages)

PAGE 1
PresCal™ Pre-adjustable pressure reducing valves 535H series 01265/21 NA FM 21654 003 Replaces 01265/19.1 NA Function Pressure reducing valves are devices which, when installed on water systems, reduce and stabilize the pressure of the water entering from the water supply main. This pressure, in general, is too high and variable for domestic systems to operate correctly.
PAGE 2
Dimensions UV outdoor protective cover E 4 560 D 30 CALEFF I 535 r H Se ies C A A NPT female A PEX expansion A A PEX crimp A press* *Lay length: ¾" press: 4¼ inch. 1" press: 5¾ inch. 1¼" press: 7 inch. 1½" press: 9 7/8 inch. 2" press: 11 inch. PVC jumper nipple PVC jumper nipple with male union thread.
PAGE 3
Operating principle Operation of the pressure reducing valve is based on the balance between two opposing forces: Pressure operating knob 1 The force of the spring towards the opening of the valve. 2 The force of the diaphragm towards the closure of the valve. UPSTREAM DOWNSTREAM 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 flow of water.
PAGE 4
Working pressures The zone exposed to upstream pressure is constructed so that it can operate at high pressure. The PTFE heavy duty rings on the compensating piston make it possible for the valve to be used continuously at upstream pressures up to 300 psi.
PAGE 5
Hydraulic characteristics Reference conditions: Graph 1 (Maximum velocity for sizing) Upstream pressure = V (f/s) 8 bar 15 V (m/s) 5 4 Downstream pressure = 3 bar 10 8 3 6 1.8 5 4 1.2 3 0.9 2 0.6 1.5 1 1/2” 1/2” 1 3/4” 1” 0.45 2” 1 1/4” 0.3 50 60 4 70 5 80 90 6 Flow rate (/s) (gpm) 40 2" 2 in 1 1/2 in 3 2.5 1 in 1 1/4 in 3/4 in (535074/5) 1 1/4" 1/2 in 5350 1" 1" 1 1/4" 1,5 5351 1/2" 3/4" ∆p (psi) ∆p 20(bar) 1/2" 3/4" Graph 2 (Pressure drop) 1 1/2" 30 2 20 1.
PAGE 6
Installation Installation recommendations Installation 1) Turn all the faucets on before installing the pressure reducing valve, theon system expelthe any air remaining 1) Turnto allflush the taps beforeand installing pressure reducingin the pipes. valve, to flush the system and expel any air remaining in the pipes. 2) Install shut-off valves upstream and downstream to facilitate maintenance operations. 2) Install shut-off valves upstream and downstream to facilitate maintenance operations.
PAGE 7
Application: Distribution circuit with booster pump FROM THE BOOSTER PUMP UNIT Application: High/low flow Small valve is set to the desired outlet pressure set point. It will handle all demand up to the point where the small valve's "falloff" pressure reaches the setpoint of the larger valve, at which point the larger valve will open to handle the increasing demand. The set point difference between the small and larger valves ranges from 7 to 10 psi.
PAGE 8
Replacement parts Application: 2-stage reduction for high pressure water supply mains Necessary when the pressure in the water supply main is greater than or equal to 3 times the required plumbing pressure set point; the amount of pressure reduction is too great for one pressure reducing valve. Example: Replacement cartridge for PresCal 535H series pressure reducing valve. 200 psi water supply main, 60 psi building pressure required.