Tunstall Air Valve

About

Quick, uniform distribution of heat to all radiation is essential to one pipe steam performance. This requires balancing the radiation by controlled venting. Tunstall’s #1P air valves are adjustable and all steam air valves are designed for positive action and straightline venting. They function automatically to vent the air.

 
 

 

  • Tunstall steam air valves are made, assembled, tested, and inspected in the U.S.
  • Each unit is individually packaged withexternal labeling for inventory convenience and maintenance
  • Steam valves have brass internals, withnickel plated and hand polished exterior.
  • 1P vents have a wide adjustment range, which simplifies the balancing of heat to each radiator.

Steam Vent Specifications

TUNSTALL STEAM VENTS
USE FOR NO. CONNECTION VENT PORT MAX OPER. PRES. OVERALL HEIGHT
FREE STANDING RADIATORS 1P 1/8” ADJUSTABLE 3/32” 3 PSI 3 1/4″
11P 1/8” MALE 1/16” 6 PSI 2 3/4″
CONVECTOR AND RISERS 31P 1/8” MALE 1/16” 6 PSI 3 3/4″
33P 1/4″ MALE 1/16” 6 PSI 3 3/4″
MAIN VENTS 35P 3/4″ MALE x 1/2″FEMALE 3/32” 3 PSI 3 1/4″
75P 3/32” 5 PSI 4 5/8”
Notes:
  1. Maximum operating pressure or drop away pressure is the maximum pressure at which the vent will continue to open and close by gravity.
  2. One pipe steam systems function best when pressure is less than 2 psi.
  3. The lower the pressure at which a system is operated, the greater its efficiency will be.

Hot Water Vent Specifications


Tunstall Hot Water Vents
USE FOR NO. CONNECTION MAX OPER. PRES.
RADIATORS 9P 1/8″ MALE 150 PSI
RADIATORS 10P 1/8″ MALE 150 PSI
AS REQUIRED 700P 1/8″ MALE 50 PSI
AS REQUIRED 14, 14A 1/8″ MALE 150 PSI

Replacement Guide

Tunstall REPLACEMENT GUIDE
TUNSTALL # DOLE # Connection Size/Description Steam(S) or Hot Water(HW)
1P 1A 1/8″ M Angle, Adjustable S
9P 9 1/8″ M Coin Valve HW
10P 10 1/8″ M Key Value HW
10-4P 10-4 KEY for #10 HW
11P 1933 1/8″ M Angle S
31P 1933 1/8″ M Straight S
33P 1933 1/8″ M Straight S
35P 1933 3/4″ M x 1/2″ F Straight S
75P 2C 3/4″ x 1/2″ Vent for Mains S
700P 2000 1/8″ M Straight, Hydronic Float Vent HW
14 14 1/8″ M Key Air Valve Assembly, 20″ x 3/16″ Tubing HW
14A 14A 1/8″ M Coin Air Valve Assembly, 20″ x 3/16″ Tubing HW

BULLETIN: TAV-0814 – Tunstall Air Valves