CALEFFI NA51 Series Manuale utente

Function

A check valve ensures that water only flows in a single direction of a

plumbing or hydronic system. The NA51 series low-lead serviceable

inline spring check valves, ideal for residential and commercial

applications, feature union connections with a variety of end connection

options for easy installation and maintenance. The valve is constructed

of a stainless steel body and low-lead brass or copper tailpieces. It

complies with low lead laws and listed by ICC-ES, and meets codes

IPC, IRC, UPC and NPC for use in accordance with the US and

Canadian plumbing codes.

Low-lead serviceable inline check valves

NA51 series

NA1070.01

www.caleffi.com

Product range

Serviceable inline spring check valves:

NA5212 series

with NPT female and male threaded, press, PEX crimp and expansion, and sweat

dual union connections, flowing Cv 17............................................

sizes ½" and ¾”

NA5213 series

with NPT female and male threaded, press, PEX crimp and expansion, and sweat

dual union connections, flowing Cv 30...........................................

sizes 1" and 1¼"

NA5214 series

with NPT female and male threaded, press, PEX crimp and expansion, and sweat

dual union connections, flowing Cv 75........................................

sizes 1½" and 2"

Technical specications

Materials - body: stainless steel

- check valve: . NBR, POM

color black in NA512 (sizes ½” & ¾”)

color white in NA513 & NA514 (sizes 1” - 2”)

- ﬁtting tailpieces: low-lead brass or copper

Performance

Suitable ﬂuids: water and non-hazardous glycol solution up to 50%

Max. Working pressure: 150 psi (10 bar)

Operating temperature range: NA512: 32 to 250°F (0 to 121°C)

NA513, NA514: 32 to 150°F (0 to 65°C)

Max. temperature, NA513, NA514 only: for one hour: 190°F (88°C)

Opening pressure differential: 0.25 psi (size ½" through 1¼")

0.50 psi (size 1½" & 2")

Certications

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

2. NSF/ANSI/CAN 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.

4. PEX crimp fittings designed to ASTM F 1807.

5. PEX expansion fittings designed to ASTM F 1960.

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.

CAUTION: Over-tightening and breakage can occur with the use of Teflon®

pipe joint compounds. Teflon®provides lubricity so that care must be

exercised not to over-tighten joints. Failure to follow these instructions

could result in property damage and /or personal injury.

WARNING: System fluids under pressure or temperature can be

hazardous. Be sure the pressure has been reduced to zero and the

system temperature is below 100°F (38°C). Failure to follow these

instructions could result in property damage and/or personal injury.

Caleffi shall not be liable for damages resulting from stress corrosion, misapplication or misuse of it products.

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

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.

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.

ATTENTION: Un serrage excessif et la rupture peut se produire avec

l’utilisation de composés à joint de tuyau en Téflon®. Pouvoir lubrifiant Teflon®

permet de sorte qu’il faut prendre soin de ne pas trop serrer les articulations.

Le non-respect de ces instructions peut entraîner des dommages matériels

et/ou des blessures.

AVERTISSEMENT: Les liquides du système sont sous pression ou de la

température peuvent être dangereux. Être sûr que la pression a été réduite

à zéro et la température du système est inférieure à 100°F (38°C). Le non-

respect de ces instructions peut entraîner des dommages matériels et/ou des

blessures.Le non-respect de ces instructions peut entraîner des dommages

matériels et/ou des blessures.

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

Calefﬁ ne pourra être tenue responsable des dommages résultant de la corrosion, d’une mauvaise

utilisation ou une mauvaise utilisation des produits.

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.

B’

NPT female

sweat

press*

PEX crimp

PEX

expansion

Dimensions

*Lay length:

½" press- 2 7/16 inch.

¾" press- 2 5/16 inch.

1" press- 4 inch.

1 ¼" press- 5 7/8inch.

1 ½" press- 5 1/8 inch.

2" press- 7 7/8 inch.

Code A B B' C Wt

(lb)

NA51200 1" metric, no ﬁttings (1) --

1 9/16"

5/8" 1.0

NA51240 ½" NPT Male 3 5/8"

13/16" 1.5

NA51249 ½" SWT 3 1/8"

NA51243 ½" NPT Female 4"

NA51246 ½" press 3 15/16"

NA51247 ½" PEX crimp 4 15/16"

NA51248 ½" PEX expansion 5 3/16"

NA51250 ¾" NPT Male 3 5/16"

NA51259 ¾" SWT 3 5/8"

NA51253 ¾" NPT Female 4 3/16"

NA51256 ¾" press 4 5/16"

NA51257 ¾" PEX crimp 4 15/16"

NA51258 ¾" PEX expansion 5 5/8"

NA51300 1 ½" metric, no ﬁttings (1) --

1 ¾"

¾" 1.5

NA51360 1" NPT Male 4 1/8"

1 1/8" 2.0

NA51369 1" SWT 3 7/8"

NA51363 1" NPT Female 3 7/8"

NA51366 1" press 5 7/8"

NA51370 1 ¼" NPT Male 5 3/8"

NA51379 1 ¼" SWT 3 3/8"

NA51373 1 ¼" NPT Female 5 3/8"

NA51376 1 ¼" press 7 7/8"

NA51400 2 ½" metric, no ﬁttings (1) --

2 ¼"

1 ¼"2.0

NA51480 1 ½" NPT Male 6 7/8"

1 ¾" 3.0

NA51489 1 ½" SWT 6 5/8"

NA51486 1 ½" press 7 7/8"

NA51490 2" NPT Male 6 7/8"

NA51499 2" SWT 5 3/8"

NA51493 2" NPT Female 5 5/8"

NA51496 2" press 10 7/8"

Installation

The Caleffi NA51 series spring check valve may be installed in either a vertical or horizontal position.

Pipe lines should be thoroughly cleaned and flushed before installing the check valve. A strainer should

be installed ahead of the check to prevent unnecessary malfunction. Install shutoff valves on inlet and

outlet of check to facilitate servicing and maintenance. Install the check valve with the arrow on the valve

body pointing in the direction of flow. Allow a minimum of 5 pipe diameters upstream straight pipe to

reduce turbulence at the check valve.

Service and Maintenance

Turn off supply water, or make sure inlet and outlet shutoff valves are in closed position, before servicing.

The Caleffi NA51 series check valves have union connections for easy removal to inspect, clean, and

either replace the plastic check valve insert, or replace the entire check valve altogether. The check

valve may be disassembled and cleaned to remove dirt, debris or scale. Always use new washers when

reassembling and do not over tighten the union nuts. The plastic check valve insert can be replaced, if

necessary, using a hammer and punch; it cannot be re-used, a new check valve insert will be necessary.

NOTES

Typical application diagram

electronically-managed

point of distribution

mixing valve

variable speed recirculation circulator

on each branch return

cold

water

check

valves

Figure 5-1

Caleffi North America, Inc.

3883 West Milwaukee Road

Milwaukee, WI 53208

T: 414.238.2360 F: 414.238.2366

05-2023

For Technical Support call 1-414-338-6338, or

email techsupport.us@calef.com

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