Install Instructions

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Table Of Contents

VP531A,C

Pneumatic Terminal Unit Valves

INSTALLATION INSTRUCTIONS

BEFORE INSTALLATION

The VP531A,C Valve is a single seated, normally-open,

straight-through pneumatic valve designed to provide equal

percentage flow in terminal units. It is available with NPT

threaded or soldered end connections.

The valve should be installed so the stem is anywhere

between upright and horizontal. The actuator cannot be lower

than the body. The direction of flow must be in the same

direction as the arrow on the valve body.

Refer to Fig. 1 for dimensions to determine the amount of

space required for proper installation. Be sure to allow enough

clearance around the actuator top for servicing the valve after

installation.

2-1/4 (DIA)

(54)

AIR CONNECTION FOR

1/4 IN. (6 mm) O.D. TUBING

1-1/2

(38)

(25)

3-1/2

(89)

NPT THREADED BODY

SOLDER BODY

1-1/2

(38)

MINIMUM

CLEARANCE

FOR

SERVICING

VALVE

REUSABLE COPPER

RING SEAL FOR

BONNET NUT

C7987A

INSTALLATION

Actuator Spring Selection

Series 2 VP531C Valves are built with a green (2-5 psi)

actuator spring. Shipped with the valve is a loose orange

(3-10 psi) spring. If desired, you can replace the green spring

with the orange. To make this change, you must remove the

cover fastener (see Fig. 2).

Before using the orange spring, make sure it can provide

adequate close off for the application. Review the close-off

ratings in Fig. 5.

VP531A,C Soldered Body (Fig. 2)

CAUTION

Soldered Body Valve Damage Hazard.

Connecting the valve without removing the

internal assembly can overheat and damage the

plug and packing beyond repair.

Remove the top and insert assembly before

connecting the VP531 soldered body valve.

The valve is shipped with a loose bonnet nut allowing easy

removal of the top and insert assembly. Lift the assembly out

before soldering the valve into place.

When soldering is completed, replace the top and insert

assembly and tighten the bonnet nut firmly enough to

compress the copper washer seal (35 to 45 ft-lb torque).

Body Size A B C D

1/2 in. NPT

(1.6 or 2.3 Cv)

1/2 in. pipe 4-1/8 in.

(104 mm)

2-9/32 in.

(58 mm)

–

3/4 in. NPT

(2.6 or 3.3 Cv)

3/4 in. pipe 4-3/16 in.

(106 mm)

2-7/16 in.

(61 mm)

–

1/2 in. Solder

(1.6 Cv)

5/8 in. (16 mm) O.D.

copper tubing

4-1/8 in.

(104 mm)

1-5/8 in.

(41 mm)

1/2 in.

(13 mm)

3/4 in. Solder

(2.6 or 3.3 Cv)

7/8 in. (22 mm) O.D.

copper tubing

4-3/16 in.

(106 mm)

1-1/2 in.

(38 mm)

3/4 in.

(19 mm)

Fig. 1. Approximate dimensions of

VP531A,C in in. (mm).

® U.S. Registered Trademark

95-7251EF-1

Summary of content (8 pages)

PAGE 1
VP531A,C Pneumatic Terminal Unit Valves INSTALLATION INSTRUCTIONS BEFORE INSTALLATION INSTALLATION The VP531A,C Valve is a single seated, normally-open, straight-through pneumatic valve designed to provide equal percentage flow in terminal units. It is available with NPT threaded or soldered end connections. Actuator Spring Selection The valve should be installed so the stem is anywhere between upright and horizontal. The actuator cannot be lower than the body.
PAGE 2
VP531A,C PNEUMATIC TERMINAL UNIT VALVES AIR CONNECTION FOR 1/4 IN. O.D. (6mm) PLASTIC TUBING COVER FASTENER ADAPTER (OBTAIN LOCALLY IF NEEDED) BONNET NUT INLET TUBE 5/8 OR 7/8 IN. O.D. (6 OR 22 mm) COPPER TUBE TERMINAL UNIT SUPPLY COPPER CONNECTION 5/8 OR 7/8 IN. O.D. (16 OR 22mm) C7988 FLOW Fig. 2. VP531A,C solder body connection. VP531A,C NPT Threaded Valve It may be convenient to remove the top and insert assembly when installing the valve. If so, unscrew the bonnet nut and lift the assembly out.
PAGE 3
VP531A,C PNEUMATIC TERMINAL UNIT VALVES SPECIFICATIONS CONTROL AIR PRESSURE psi (kPa) Controlled Medium Temperature: VP531A: 180°F (82°C) maximum. VP531C: 240°F (116°C) maximum. Maximum Difference for Alternating Hot and Cold Water: 140°F (78K). Maximum Safe Air Pressure: 30 psi (207 kPa). Maximum Pressure Differential (for quiet service and normal life of disc and seat): Water: 20 psi (138 kPa). Steam (VP531C only): 10 psi (69 kPa). Close Off Ratings: See Fig. 5.
PAGE 4
Automation and Control Solutions Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 95-7251EF–1 Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Scarborough, Ontario M1V 4Z9 B.B. Rev. 12-02 Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers. www.honeywell.
PAGE 5
Vannes pneumatiques pour unité terminale VP531A,C NOTICE D'INSTALLATION AVANT D'INSTALLER CE PRODUIT… RACCORD D'AIR POUR CANALISATION DE 6 mm (1/4 PO) DIAM. EXT. Les VP531A et C sont des vannes pneumatiques normalement ouvertes à passage direct et à simple siège qui assurent un débit à pourcentage égal dans les unités terminales. Elles sont offertes avec des raccords filetés NPT ou à souder.
PAGE 6
VANNES PNEUMATIQUES POUR UNITÉ TERMINALE VP531A,C INSTALLATION Choix du ressort de l'actionneur Les vannes VP531C de la série 2 sont munies d'un ressort de rappel vert (2-5 psi). Un ressort orange (3-10 psi) est également fourni dans l'emballage. Pour remplacer le ressort vert par le ressort orange, enlever l'attache du couvercle (voir la Fig. 2). Vannes VP531 A et C à extrémités à souder (Fig. 2) MISE EN GARDE Risque de dommage au corps de vanne à souder.
PAGE 7
VANNES PNEUMATIQUES POUR UNITÉ TERMINALE VP531A,C Installer la vanne selon les méthodes de tuyautage recommandées pour empêcher le gauchissement du corps de vanne. Voir la Fig. 3.
PAGE 8
Solutions de régulation et d‘automatisation Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 95-7251EF–1 Honeywell Limited-Honeywell Limitée 35, Dynamic Drive Scarborough (Ontario) M1V 4Z9 B.B. Rév. 12-02 Imprimé aux États-Unis sur du papier recyclé contenant au moins 10 % de fibres post-consommation. www.honeywell.