Product Overview

ManualsBrandsCaleffi ManualsHeating Supplies1-1/2" NPT 3-Way High Flow Thermostatic Mixing Valve, 13 Cv (Lead Free)

CALEFFI

ISO 9001 No. 0003

ACCREDITED

ISO 9001 FM 21654

Thermostatic mixing valves,

low-lead, high-flow

5231 series

Function

The thermostatic mixing valve is used in systems producing domestic

hot water or in radiant heating systems. Its function is to maintain the

temperature of the mixed water supplied to the user at a constant set

value when there are variations in the supply pressure and temperature

of the incoming hot and cold water or in the ﬂow rate.

The 5231 series thermostatic mixing valves are ASSE 1017 approved

for point of distribution and are designed specifically for systems

requiring high flow rates and precise, stable temperature control.

Optional stainless steel inlet port check valves are available separately,

for ﬁeld installation only.

This valve is certiﬁed by ICC-ES to be in compliance with the International

Plumbing Code (IPC), International Residential Code (IRC), Uniform

Plumbing Code (UPC), National Plumbing Code of Canada (NPC),

and standards ASSE 1017-2009, and CSA B125.3-2012. It is certiﬁed

by ICC-ES to be in compliance with standard NSF/ANSI 372-2011,

Drinking Water System Components – Lead Content Reduction of

Lead in Drinking Water Act, California Health and Safety Code 116875

S.3874, Reduction of Lead in Drinking Water Act.

Technical specification

Materials - Body: DZR low-lead brass

- Shutter: PPSG40

- Springs: Stainless steel

- Seals: peroxide-cured EPDM

- Check valve extension (field installed): Stainless steel

Performance

Suitable fluds: Water, glycol solutions

Maximum percentage of glycol:

0% glycol solution

Mixed temperature adjustment setting range: 95 – 150°F (35 – 66°C)

Temperature stability: ± 3°F (± 2°C)

Max working pressure (static): 200 psi (14 bar)

Max operating differential pressure: 75 psi (5 bar)

Hot water inlet temperature range: 120 – 195°F (49 – 91°C)

Cold water inlet temperature range: 39 – 80°F (3.9 – 26.6°C)

Maximum inlet pressure ratio (H/C or C/H) for optimum performance: 2:1

Minimum temperature difference between hot water inlet

and mixed water outlet for optimum performance: 20°F (11°C)

Maximum water hardness: 10 grains

Product Range

Code 5231_0A Thermostatic mixing valve (ASSE 1017) with threaded connections........................................................sizes 1”, 1-1/4”, 1-1/2”, 2” NPT male union

Code 5231_8A Thermostatic mixing valve (ASSE 1017) with sweat connections.................................................................. sizes 1”, 1-1/4”. 1-1/2", 2" sweat union

Code 5231_9A Thermostatic mixing valve (ASSE 1017) replacement body without fittings or union nuts..................................................sizes 1-1/2”, 2” thread union

Code 523177A Thermostatic mixing valve (ASSE 1017) with sweat connections and outlet temperature gauge..................................... size 1-1/4” sweat union

1256/18.2 NA

places 01256/18.1 NA

Certifications

1. ASSE 1017/CSA B125.3, certified by ICC-ES, file

PMG-1357

2. NSF/ANSI 372-2011, Drinking Water System

Components-Lead Content Reduction of Lead in

Drinking Water Act, California Health and Safety Code

116875 S.3874, Reduction of Lead in Drinking Water

Act, certifed by ICC-ES, file PMG-1360.

Connections

- NPT male union:

1”, 1-1/4”, 1-1/2”, 2”

- sweat union:

1”, 1-1/4”, 1-1/2”, 2”

Summary of content (8 pages)

PAGE 1
Thermostatic mixing valves, low-lead, high-flow CALEFFI 5231 series 01256/18.2 NA ACCREDITED ISO 9001 FM 21654 ISO 9001 No. 0003 Replaces 01256/18.1 NA Function The thermostatic mixing valve is used in systems producing domestic hot water or in radiant heating systems. Its function is to maintain the temperature of the mixed water supplied to the user at a constant set value when there are variations in the supply pressure and temperature of the incoming hot and cold water or in the flow rate.
PAGE 2
Dimensions Dimensions with check valves C B C B B Sweat version Sweat version A H A E D 110 130 150 90 F 170 70 190 50 30 E E D E D C A A H D A C F F A A B 210 A 110 130 150 90 F 170 70 A Code 210 A A B C D E F Wt (lb) 1" NPT 4" 8" 7 5/8" 4 3/16" 3 3/8" 7.0 523168A 1" SWT 3 5/16" 6 5/8" 7" 3 1/2" 3 3/8" 7.0 523170A 1 1/4" NPT 4 1/8" 8 1/4" 7 3/4" 4 5/16" 3 3/8" 7.
PAGE 3
Instantaneous production of hot water Principle of Operation A thermostatic mixing valve mixes hot and cold water in such a way as to maintain a constant set temperature of the mixed water at the outlet. A thermostatic element is fully immersed into the mixed water. It then contracts or expands causing movement of the piston, closing either the hot or cold inlets, regulating the flow rates entering the valve.
PAGE 4
Locking the setting Position the knob at the required value, unscrew the top screw, slide off the knob and put it back in such a way that the handle fits into the internal slot of the knob. Tighten the head screw. 1 MIN 2 Setting the temperature The temperature is set to the required value by means of the adjusting knob with the graduated scale on the top of the valve.
PAGE 5
Recirculation with point-of-distribution thermostatic mixing valves For domestic recirculating systems that include a single ASSE 1017 pointof-distribution thermostatic mixing valve, such as the Caleffi 5231 series thermostatic mixing valves, the piping installation below is recommended. In any reciculating hot water distribution system there will be times when the circulator is operating, but no hot water is being drawn at the fixtures.
PAGE 6
Replacement fittings Item Description Item quality per valve 1 inch 1 ¼ inch 1 ½ inch 2 inch NPT Sweat NPT Sweat NPT Sweat NPT Sweat 523160A 523168A 523170A 523178A 523177A 523180A 523188A 521390A 523198A Union Washer 3 R50057 R50060 Union Nut 3 R31589 R51838 Male Tailpieces 3 Inlet Check Valve Assembly- field installed only 2 Outlet adapter with temperature gauge 1 Replacement temperature gauge with pocket well 1 688003A Replacement temperature gauge 1 R39591 NA10
PAGE 7
NOTES
PAGE 8
SPECIFICATION SUMMARIES 5231 series Adjustable thermostatic mixing valve. ASSE 1017/CSA B125.3 certified by ICC-ES. Threaded NPT or sweat connections from 1” to 2” with unions and tailpieces. DZR low-lead brass body (<0.25% lead content), meets requirements of IPC, IRC, UPC, NPC and ANSI/NSF 372-2011 certified by ICC-ES. PPSG40 shutter, stainless steel springs, and peroxide-cured EPDM seals. Maximum working pressure 200 psi (14 bar). Maximum operating differential pressure 75 psi (5 bar).