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ONE-PIPE STEAM VALVE ASSEMBLY

OPSK

Tunstall Corporation

118 Exchange Street • Chicopee, MA 01013

We reserve the right to alter designs, specifications and information without notice.

Phone (413) 594-8695 · Fax (413) 598-8109

www.tunstall-inc.com • www.maconcontrols.com

Bulletin-OPSK-0714

Non-Electric Operators

Example

Macon MTW

Direct Thermostatic Operator

Vent

Vacuum Breaker

Valve Body

DATA - One-pipe Steam Valve Assembly

Maximum temperature: 248°F

Disc Material: EPDM

Valve body material: Forged, nickel-plated brass

Body style: Angle pattern

Connections: 1/8" male NPT, fits in vent tapping of

the radiator

Temperature range: 46°-82°F

Maximum movement: .125 (3mm)

Movement per 1°F change in ambient: .007 (.15mm)

Note: Additional information and installation instructions

can be found in Technical & Service Section.

Dial Setting

Room

Temperature

(F)

0 Off

* 46º

1 54º

3 61º

5 68º

6 72º

7 76º

8 80º

9 82º