CALEFFI PresCal 5355H Series Guida utente

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 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.

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

5356H Series

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

connections, sizes

¾” and 1".

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".

PresCal™ Pre-adjustable pressure reducing valves

Installation, commissioning and servicing instructions

NA10397.03

www.caleffi.com

ASSE 1003

NSF 61

CAUTION: If the 535H series pressure reducing valve is not installed,

commissioned and maintained properly, according to the instructions contained

in this manual, it may not operate correctly and may endanger the user.

CAUTION: Make sure that all the connecting pipework is water tight.

CAUTION: When making the water connections, make sure that the

connecting pipework is not mechanically over-stressed. Over time this could

cause breakages, with consequent water losses which, in turn, could cause

harm to property and/or people.

CAUTION: Water temperatures higher than 100°F (38°C) can be dangerous.

During the installation, commissioning and maintenance of the 535H PRV,

take the necessary precautions to ensure that such temperatures do not

endanger people.

Leave this manual for the user

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.

CAUTION: All work must be performed by qualified personnel trained in the

proper application, installation, and maintenance of systems in accordance

with all applicable codes and ordinances.

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.

ATTENTION: Si le réducteur de pression, Série 535H, n'est pas installé, mis en

service et entretenu correctement, selon les instructions contenues dans ce manuel,

il peut ne pas fonctionner correctement et peut mettre en danger l'utilisateur.

ATTENTION: S'assurer que tous les raccordements sont étanches.

ATTENTION: Lorsque vous effectuez les raccordements d'eau, assurez-

vous que la tuyauterie reliant réducteur de pression n'est pas mécaniquement

des overstressed. Au fil du temps, ceci pourrait causer des ruptures, avec

pour consequence des pertes en eau qui, à leur tour, peuvent causer des

dommages à la propriété et/ou les gens.

ATTENTION: les températures de l'eau supérieure à 100°F (38°C) peut

être dangereux. Au cours de l'installation, mise en service et l'entretien de

le réducteur de pression, Série 535H, prendre les precautions nécessaires

afin de s'assurer que de tells températures ne compromettent pas les gens.

LAISSEZ CE MANUEL AVEC L’UTILISATEUR

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.

ATTENTION: Tous les travaux doivent être effectués par du personnel

qualifié formé à la bonne application, installation et maintenance des systèmes

conformément aux codes et règlements locaux.

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. Pour plus d’informations rendez-vous www.P65Warnings.ca.gov.

Technical specifications

Materials: - Body: DZR low-lead brass EN 12165 CW724R

- Cover: glass reinforced nylon PA66M40/1

- Control stem: stainless steel EN 10088-3 (AISI 303)

- Moving parts: DZR low-lead brass EN 12165 CW724R

- Diaphragm & seals: peroxide-cured EPDM

- Compensation piston rings: PTFE

- Filter stainless steel EN 10088-3 (AISI 304)

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

- Shuttle: PPSG40

Max working pressure: 300 psi (20 bar)

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

Factory setting: 45 psi (3 bar)

Max. working temperature: 180°F (80°C)

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

Filter mesh size: 0.51 mm (35 mesh)

Suitable fluids: water

Main connections: -NPT female and sweat union

½",

¾”, 1", 1¼", 1½" and 2"

-PEX expansion union ¾”

-Press and PEX crimp union

¾” & 1"

Lay length (¾" press connection): size

¾”:

"; size 1": 5

¾”

Pressure gauge connection: 1/8" NPT female

Approvals

1. ICC-ES certified to ASSE 1003, CSA B356, NSF/ANSI 61 (180°F/82°C Commercial Hot),

file PMG-1356.

2. 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, certified by ICC-ES, file PMG-1360.

Hydraulic characteristics

∆p (bar)

0,5

0,2

0,1

1,5

0,3

0,4

0,6

0,8

1,2

0,9

0,7

∆p (m w.g.)

5351

1/2"

3/4"

5350

1/2"

3/4"

1 1/4"

1 1/2"

0.45

V (m/s)

0.1

0.3

1 1/4"

(535074/5)

1”

1 1

4”1

2” 3

4”

0,2

100

Flow rate

(l/min) (m

/h)

200

1.5

V (f/s)

0.3

Flow rate

(/s)

(gpm)

0.9

0.5

0.2

0.1

0.05

1.5

0.3

0.4

2.5

0.150.5

2 0.6

3 0.9

6 1.8

4 1.2

2”1 2”

Graph 1 (Circulation speed)

103

150

117

1.5

1 in

1 1/4 in

3/4 in

1/2 in

FALL OFF PRESSURE

Reference values: Upstream pressure = 116 psi (800 kPa)

Downstream presssure = 43 psi (300 kPa)

∆

p (psi)

∆

p (kPa)

1 1/2 in

2 in

Flow rate

(/s)

(gpm)

0.9

0.5

0.2

0.1

0.05

1.5

0.3

0.4

2.5

Graph 2 (Pressure drop)

Sizing procedure

Flow velocity is recommended to be kept within 3 to 6 feet per second when calculating the

correct pressure reducing valve size. This will prevent noise in the pipes and rapid wear of

appliances.

The correct diameter of the pressure reducing valve is taken from graph 1 on the basis of the

design flow rate taking into account an ideal flow velocity of between 3 and 6 f/s (blue band).

Example:

For 8 gpm, select the ¾” size valve (see arrow on graph 1).

The pressure drop is taken from graph 2 also on the basis of where the design flow rate

intersects the curve for the valve size already selected (the downstream pressure falls by an

amount equal to the pressure drop, with respect to the set pressure at no flow condition).

Example:

For 8 gpm the Dp = 7.3 psi (see arrow on graph 2).

Design Flow Rate

Size ½" ¾" 1" 1¼" 1½" 2"

gpm 4 to 7.3 7 to 12.5 10 to 19 17 to 34 24 to 44 37 to 70

Installation

Before following the numbered steps listed, the installer must:

a) Be sure this pressure reducing valve is compatible with the other equipment in the system that

it may interact with or come into contact;

b) Assess and acknowledge all hazards related to the use of the this product, including potential

leakage, by installing this unit properly;

c) Install shut-off valve with pressure ports or similar equipment to measure the upstream pressure.

1) Turn all the faucets on before installing the pressure reducing 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.

3) The pressure reducing valve may be installed on either vertical or horizontal pipe. However, it

must not be installed upside down.

4) Close the downstream shut-off valve.

5) This mechanical pre-adjustment system, with the operating knob and pressure indicator visible

from both sides, allows the pressure reducing valve to be set to the required value in the system

prior to installation. The pressure indicator features incremental step movement, so that the

pressure can be adjusted continuously and the value displayed at 15 psi increments.

6) Set using the operating knob on the upper part of the valve. The

pressure reducing valves are factory set to a pressure of 45 psi.

7) Because the pre-adjustment dial displays in 15 psi increments, the optional

downstream outlet pressure gauge can be used to show the exact outlet pressure,

which is especially useful for applications requiring this precision.

8) After installation, the internal mechanism will automatically control the pressure, until the set

580 Series

580S e ries

580 Series

Installation recommendations

1. Installation below ground

Installation below the ground is not advisable.

2. Outdoor installation

Pressure reducing valves should not be installed outside the building unless properly protected from

freezing and the weather.

3. Water hammer

Water hammer is a common reason for pressure reducing valve failures. Specific devices should

be installed to absorb water hammer for systems with this risk.

Installation

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.

When installing in large buildings, short pipes or expansion valves, and/or similar equipment, is

recommended to limit the increased pressure due to the thermal expansion of water caused by

temperature changes downstream of the pressure reducing valve itself (or downstream of the first

and second stage pressure reducing valves, if two are used).

580 Se ries

1° stage

PRV

2° stage

PRV

expansion expansion

Downstream set pressure (kPa)

2000

1600

1200

800

400

Cavitation

high risk

Normal working

conditions

Out of working

conditions

Upstream pressure (kPa)

100

200

400

600

800

1000

1200

Cavitation diagram

116

145

174

116

174

232

290

Downstream set pressure (PSI)

Upstream pressure (PSI)

To minimize the risk of cavitation within the valve that may result in malfunctioning with erosion

of the valve sealing area, vibrations and noise, it is highly recommended to refer to the working

conditions represented in the above diagram. Due to the numerous factors and variable conditions

experienced such as system pressure, water temperature, air presence, flow rate and velocity,

which may affect the behavior of the pressure reducing valve, it is advisable that the pressure ratio

between the upstream pressure and the downstream set pressure is kept ideally to a value 2:1

and no greater than a value of 3:1 (For example, upstream 150 psi (10 bar), set pressure 75 psi

(5 bar), the pressure ratio = 150/75 = 2:1). In these conditions, the possible risk of cavitation and

malfunctioning is minimized, however this does not exclude the possible effects of the many other

variables within the system under operating conditions. If the pressure ratio exceeds the indicated

limit, the system design pressure or use of 1st stage pressure reducing valves shall be reviewed

(For example, 1st stage reducing pressure from 200 to 100 psi and then 2nd stage from 100 to

58 psi). Piping upstream and downstream of the pressure reducing valve shall be supported in

accordance with the manufacturer’s instructions, and any local authority requirements, to avoid

the creation and transfer of vibration and/or noise into the installation.

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.

Code Description Face-to-Face

Dimension

NA11304 Jumper nipple for 535H ½" series 3"

NA11305 Jumper nipple for 535H ¾" series 3 9/16"

NA11306 Jumper nipple for 535H 1" series 3 ¾"

NA11307 Jumper nipple for 535H 1¼" series 4 5/16"

NA11308 Jumper nipple for 535H 1½" series 4 ¾"

NA11309 Jumper nipple for 535H 2" series 5 ¼"

Maintenance

The pressre 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.

The cartridge, containing the diaphragm, strainer, seat, valve plug and compensating piston,

is pre-assembled as a self-contained unit with a cover and can be removed for inspection and

maintenance. When checking, cleaning or replacing the cartridge:

1) Shut off the inlet and outlet isolation valves.

2) The downstream pressure setting can be left at the set value.

3) Remove the upper cover, using a spanner. This cover is integral with the cartridge.

4) Check and clean the filter.

For the brass DIRTMAG®, the ferrous impurities

are captured by a strong neodymium rare-

earth magnetic ﬁeld created by a powerful

removable magnet around the body below

the ﬂow line.

580 S eri es

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