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01252/19 NA

PresCal

 

C

ompact 

pressure reducing valves

Function

Pressure reducing valves are devices which, when installed in 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™ 

Compact  5

33H series pressure reducing valve, ideal for small

 

system applications, is constructed of a DZR low-lead forged brass body and 
incorporates a unique noise reducing and high flow seat design. It is easily 
serviced with a replaceable cartridge and has an integral stainless steel 
filter (35 mesh), helpful for water systems that may contain sediment or 
debris. A tamper-resistant cap is included to replace the standard cap to hide 
the adjustment screw to help prevent set point tampering.

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, NPC and UPC for use in accordance with 
the US and Canadian plumbing codes.

Product range

5333H Series 

PresCal 

C

ompact pressure reducing valve with or without pressure gauge, connections NPT female threaded union inlet 

and NPT female outlet.......................................................................................................................................................................sizes ½” and ¾” 

5336H Series 

PresCal 

C

ompact pressure reducing valve with or without pressure gauge, connections press union inlet 

and NPT female outlet...................................................................................................................................................................................sizes ¾” 

5337H Series 

PresCal 

C

ompact pressure reducing valve with or without pressure gauge, connections PEX crimp union inlet 

and NPT female outlet...................................................................................................................................................................................sizes ¾”

5338H Series 

PresCal 

C

ompact pressure reducing valve with or without pressure gauge, connections PEX expansion union inlet 

and NPT female outlet...................................................................................................................................................................................sizes ¾”

5339H Series 

PresCal 

C

ompact pressure reducing valve with or without pressure gauge, connections sweat union inlet 

and NPT female outlet.......................................................................................................................................................................sizes ½” and ¾”

CALEFFI

003

FM 21654

ASSE 1003

NSF 61

Technical specifications

 

Materials

     

- Body:       

DZR low-lead forged brass EN 12165 CW724R

                          

- Cover:

g

lass reinforced nylon PA6G30

                   

-

Control stem:

          

stainless steel EN 10088-3 (AISI 303)

                                               

-

Moving parts

:      

DZR low-lead brass EN 12164 CW724R

 

-

Diaphragm & seals:

peroxide-cured EPDM

 

- Compensation piston rings:

PTFE 

-

Filter

:

stainless steel EN 10088-3 (AISI 304) 

-

Seat

:

s

tainless steel EN 10088-3 (AISI 303) 

-

Shuttle

:

PPSG40

Performance  

Suitable fluids: 

water

Downstream pressure setting range

15 - 80 psi (1 - 5.5 bar) 

Factory setting

45 psi (3 bar) 

Max working pressure

250 psi (17.25 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)

Certifications

1. Complies with codes IPC, IRC, UPC and NPC.

ICC-ES certified to ASSE 1003, CSA B356

(R2015), and 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, Vermont Act 193 - The Lead in Plumbing

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

certified by ICC-ES, file PMG-1360.

3. PEX crimp fittings certified to ASTM F 1807.
4. PEX expansion fittings certified to ASTM F 1960.

Connections

  

Main connections: 

-NPT female union, sweat union inlet;

and NPT female (FNPT) outlet.........................................

½”

    

-NPT female union, sweat union, press union,

PEX crimp union or PEX expansion union inlet; 

and NPT female (FNPT) outlet........................................

¾”

Pressure gauge connection:

1/8

” NPT female

 

Summary of Contents for PresCal Compact 533H Series

Page 1: ...ssure reducing valve with or without pressure gauge connections PEX expansion union inlet and NPT female outlet sizes 5339H Series PresCal Compact pressure reducing valve with or without pressure gauge connections sweat union inlet and NPT female outlet sizes and CALEFFI 003 FM 21654 ASSE 1003 NSF 61 Technical specifications Materials Body DZR low lead forged brass EN 12165 CW724R Cover glass rein...

Page 2: ...3951HA sweat 4 3 1 4 533350HA FNPT 4 3 11 16 1 1 533351HA FNPT 4 3 11 16 1 2 533650HA press 4 3 1 5 533651HA press 4 3 1 6 533750HA PEX crimp 4 9 16 3 15 16 1 7 533751HA PEX crimp 4 9 16 3 15 16 1 8 533850HA PEX expansion 4 15 16 3 13 16 1 7 533851HA PEX expansion 4 15 16 3 13 16 1 8 B A D C B A CALEFFI A A sweat press PEX crimp A NPT female union CALEFFI E PEX expansion A lay length NPT female in...

Page 3: ...r 0 60 20 40 80 100 0 1 2 5 6 7 3 4 psi bar psi 0 30 60 150 120 90 0 60 20 40 80 100 0 1 2 5 6 7 3 4 psi bar 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 2 The force of the diaphragm towards the closure of the valve Construction details Contoured diaphragm The diaphragm is...

Page 4: ...alls by an amount equal to the pressure drop with respect to the set pressure at no flow condition Example For 8 gpm the p 10 psi see arrow on graph 2 Design Flow Rate Size gpm 3 to 5 6 5 6 to 10 l min 11 to 21 21 to 38 p bar 0 5 1 0 2 0 1 1 5 0 3 0 4 0 6 0 8 1 2 0 9 0 7 p m w g 5 10 2 1 15 3 4 6 8 12 9 7 5351 1 2 3 4 5350 1 2 3 4 1 1 1 1 4 1 1 2 2 0 45 5 V m s 0 1 4 3 0 3 1 1 4 535074 5 1 2 3 4 1...

Page 5: ... Caviation diagram The ideal upstream pressure to downstream pressure ratio is 2 1 and no more than 3 1 For example upstream pressure 80 psi downstram pressure 40 psi pressure ration is 80 40 2 1 Under this condition the risk of cavitation is minimized If the pressure ratio is in the High risk of cavitation range see above chart consider staging the pressure drop For instance break up a large syst...

Page 6: ... Downstream pressure setting range from 15 psi to 80 psi 1 bar to 5 5 bar Self contained cartridge removable for maintenance purposes Equipped with operating knob with manual setting with adjustment screw Provided with tamper resistant cap for optional use Provide with optional pressure gauge with 0 psi to 100 psi 0 bar 7 bar pressure scale Pressure gauge connection 1 8 NPT female We reserve the r...

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