Install Instructions

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

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 PresCal™ 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/ANSI 372, low lead laws and listed by ICC-ES. It

meets codes IPC, IRC and UPC 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.

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" and 2".

5355H Series

Pre-adjustable pressure reducing valve with or without pressure gauge and PEX expansion

union connections, size

" and 1".

5356H Series

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

connections, sizes ½",

¾”, 1", 1¼", 1½" and 2".

5357H Series

Pre-adjustable pressure reducing valve with or without pressure gauge and union PEX

crimp connections, sizes

¾” and 1".

5359H Series

Pre-adjustable pressure reducing valve with or without pressure

gauge and union sweat connections,

sizes ½",

¾”, 1", 1¼", 1½" and 2".

NA5398H Series

Pre-adjustable pressure reducing valve with or without pressure

gauge, body only, connections field installed,

sizes ½",

¾”, 1", 1¼", 1½" and 2".

PresCal™ Pre-adjustable pressure reducing valves

Installation, commissioning and servicing instructions

NA10397.05

www.caleffi.com

535H Series

NSF/ANSI/CAN 61

All models come with UV outdoor

protective cover as pictured here.

Summary of content (12 pages)

PAGE 1
NA10397.05 www.caleffi.com PresCal™ Pre-adjustable pressure reducing valves 535H Series © Copyright 2021 Caleffi Installation, commissioning and servicing instructions 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
SAFETY INSTRUCTION This safety alert symbol will be used in this manual to draw attention to safety related instructions. When used, the safety alert symbol means. ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN A SAFETY HAZARD. WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
PAGE 3
CONSIGNE DE SÉCURITÉ Ce symbole d'avertissement servira dans ce manuel à attirer l'attention sur la sécurité concernant instructions. Lorsqu'il est utilisé, ce symbole signifie. ATTENTION! DEVENEZ ALERTE ! VOTRE SÉCURITÉ EST EN JEU ! NE PAS SUIVRE CES INSTRUCTIONS PEUT PROVOQUER UN RISQUE DE SECURITE. AVERTISSEMENT: Ce produit peut vous exposer à des produits chimiques comme le plomb, qui est connu dans l’État de Californie pour causer le cancer, dommages à la naissance ou autre.
PAGE 4
Technical specifications Materials: - Body: Housing: Outdoor protective cover: Control stem: Moving parts: Diaphragm & seals: Compensation piston rings: Filter Seat: Shuttle cartridge: DZR low-lead brass CR EN 1982 CC768S glass reinforced nylon PA66M40/1 UV stabilized ABS, gray DZR low-lead brass CR EN 12164 CW724R DZR low-lead brass CR EN 12164 CW724R peroxide-cured EPDM PTFE stainless steel EN 10088-3 (AISI 304) stainless steel EN 10088-3 (AISI 303) PPSG40 Max working pressure: Downstream pressure set
PAGE 5
Hydraulic characteristics Graph 1 (Maximum velocity for sizing) V (f/s) V (m/s) 5 15 4 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 70 5 80 90 6 Flow rate (/s) (gpm) 2" 4 40 3 2.5 1 1/2" 30 2 20 1.5 (535074/5) 1 1/4" 1/2" 3/4" 1,5 5350 1/2" 3/4" 5351 ∆p (bar) 1" 1" 1 1/4" 1 0.5 0.4 5 0.3 0.2 2 0.1 0.05 10 0.1 4 0.3 3 0.15 0.9 1 0.5 ∆p (m w.g.
PAGE 6
2 in 1 1/2 in 1 in 1 1/4 in 1/2 in 3/4 in Graph 2 (Pressure drop) ∆p (kPa) ∆p (psi) 150 20 117 103 90 10 68 62 7 48 5 35 28 50 60 4 70 5 80 90 6 Flow rate (/s) (gpm) 3 2.5 2 1.5 1 0.5 0.4 5 0.3 0.2 2 0.1 0.05 Reference values: 40 10 30 1.5 20 14 10 2 4 20 3 3 0.
PAGE 7
Installation Each 535H PRV comes with a snap-on protective cover which is designed to resist UV rays, for outdoor locations, and to provide a significant level of protection against dust, dirt and water. It does not protect against freezing; do not mount the valve in locations where it may freeze. Protective cover not approved for use in plenum installations.
PAGE 8
When installing the pressure reducing valve upstream of a hot water tank, installing an expansion tank, or similar, is recommended to absorb the increase in pressure due to the thermal expansion of water.
PAGE 9
PVC jumper nipple with male union thread. The length of the jumper nipple matches the 535H valve face-to-face dimension, allowing the piping to be completed prior to the installation of valve and permitting quick change out from the jumper to the valve.
PAGE 10
Maintenance The pressure reducing valve must be checked and serviced to comply with applicable regulations. Even when installed, commissioned and serviced properly, the pressure reducing valve's internal components are subject to normal wear and tear, which may result in leaks and other malfunctions. Check or good working order and service and clean the cartridge at least every 12 months.
PAGE 11
Troubleshooting System failures are not always caused by the pressure reducing valve. Most frequently: 1. Increased downstream pressure in the presence of a water heater If the downstream pressure increases beyond the desired setting due to an inline water heater, install an expansion tank between the pressure reducing valve and the water heater to absorb the increased pressure, caused by water expansion from heating. 2.
PAGE 12
Replacement parts Replacement cartridge for PresCal 535H series pressure reducing valve. Pressure gauge fits 535H series pressure reducing valves. Pressure range 0 to 100 psi (0 to 7 bar). NA10273....................................1/8" NPT male 535006HA .....fits 535H ½”, ¾” 1” 535009HA......fits 535H 1¼”, 1½”, 2” Replacement UV outdoor protective cover for PresCal 535H series pressure reducing valve. Gauge port plug. NA10438....................................1/8" NPT male NA10811 .....