Varivalve Adjustable Straight Valve Zoom

Varivalve Adjustable Straight Valve

SKU:VASA

Brand: Varivalve

Varivalve
Qty Price
$18.55
/ each
$171.50 / box (10 units x $17.15)
In Stock! Ships in 24-48 Hours
(45 Available)
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Resources

Specs

Application: Radiator Vent
Size: 1/8"
System Type: Steam
Material: Brass
Mount: Straight
Adjustability: Adjustable
Thread Type: Male
Max Temp (F): 240°F
Temperature Range (F): 140°-240°F
Min Temp (F): 140°F
Thread Size: 1/8"
Warranty: 1-Year Warranty

Description for Varivalve VASA

The venting capacity of radiator air vents and main line air vents used in single pipe steam heating systems has an important effect on the operation of these systems. In order to obtain a better understanding of these effects, The Center for Energy and Environment conducted experiments both in the laboratory and in the field to investigate the properties of single pipe steam air venting.

Commercially available radiator and main line air vents were tested and compared. Main line air vents in one building were replaced with open pipe orifices of different sizes, and the resulting fill characteristics of the main steam lines were observed. The purpose of the main line air vent is to rapidly vent the relatively large quantity of air in the main lines. This allows the main lines to fill more quickly and thus reduces the time difference of steam arrival at the different risers. A larger orifice allows the air to be pushed out at a lower back pressure.

Features:

The function of the radiator air vent is to provide a means for air to be driven out of the radiator as steam enters. At a given pressure the fill time of a radiator varies proportional to its heat capacity and inversely proportional to the venting capacity of the radiator air vent. It is possible to control the speed at which a radiator will fill with steam by installing a radiator air vent with a certain venting capacity. Used in this manner, radiator air vents are helpful in evening out the heat distribution in a building.

Specifications:

  • Size: 1/8"
  • Type: Straight
  • Adjustability: Adjustable
  • Adjustable valves can be installed anywhere in your home and adjusted based on the distance from the valve to the boiler

Varivalve Adjustable Straight Valve

REVIEW SNAPSHOT®

by PowerReviews
Varivalve Adjustable Straight Valve
 
4.3

(based on 7 reviews)

Ratings Distribution

  • 5 Stars

     

    (3)

  • 4 Stars

     

    (3)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Reviewed by 7 customers

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Displaying reviews 1-7

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4.0

As advertised, although pricey

By Daniel

from Holyoke, MA

Verified Buyer

Comments about Varivalve Adjustable Straight Valve:

The vari-valves do what they're intended to do--they adjust speed of steam release, however, at least with direct mount Danfoss thermostatic controllers there can be significant spitting & gurgling. The design of this valve eliminates hissing, but if the steam flow's not dry vari-valves will gurgle audibly. Have done quite a bit of serious canting of radiators to drain condensation toward the steam pipe, but it does not help if the flow is wetter than it should be. But that said, the basic principal of the device is sound.

 
3.0

Great, when it works.

By Joe the Swimmer

from New York

Verified Buyer

Comments about Varivalve Adjustable Straight Valve:

I bought 10 of them six years ago. Unfortunately most failed after 2-4 years. They were stuck shut, useless.
When they don't fail, they work extremely well, so I just ordered a few more hoping that the first ones had a defect and the new ones will be from a better batch.

 
5.0

I would buy this product about.

By Jeremy

from 261 5th ave

Verified Buyer

Comments about Varivalve Adjustable Straight Valve:

I like the automatic air venting on this product I work on a lot of heating systems that need manual air bleeding you don't have to do anything once you install this product it just works great on radiators & baseboards systems.

 
4.0

varivalve steam vent

By Vic

from Harrisburg, PA

Verified Buyer

Comments about Varivalve Adjustable Straight Valve:

I recently tested 3 new installed vents in my steam system and they work quickly and efficiently. The adjustability is what led me to this product. This allows adjustment depending on radiator proximity to the source.

 
5.0

Easy adjustability for air flow

By Monomie

from Weehawken, N.J.

Verified Buyer

Comments about Varivalve Adjustable Straight Valve:

Great updated look for new slim line radiators with the same quality found in traditional valves.

 
4.0

Main vents

By Xoph

from Hartford, Conn.

Verified Buyer

Comments about Varivalve Adjustable Straight Valve:

I use those as main vents. They release a small amount of steam before shutting off. I have no problem with that. I would buy it again.

 
5.0

My single pipe system is a lot quieter

By Mark

from Vermont

Verified Buyer

Comments about Varivalve Adjustable Straight Valve:

The little valves work great. Very quiet.

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Q&A: Ask the Questions, share answers

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2 Questions | 2 Answers
Displaying questions 1-2
  • Varivalve Adjustable Straight Valve

    Q:

    Can I use these with thermostatic steam valves? If so, would I have to keep them open at all times? Or should I go with non-adjustable ones?
    Asked on 11/1/2014 by Radiator_fan

    1 answer

    • VERIFIED BUYER

      A:

      Yes you can and I do. The adjustable valve allows you to control how
      quickly the radiator heats up and the thermostat will close the vent when
      the room reaches the desired temperature. When your radiator heats too
      quickly it will overheat and even with the thermostat closing the vent, the
      room will overheat some so you need to find the correct speed for the
      radiator to heat and this will vary some from moderate outdoor temperatures
      to very cold days. Find a good compromise and don't play with it after
      that.

      Answered on 11/2/2014 by Anonymous
  • Varivalve Adjustable Straight Valve

    Q:

    do varivalvs ever get cloged and prevent radiaor from getting hot?
    Asked on 11/6/2010 by Dave from Brooklyn, NY

    1 answer

    • CUSTOMER CARE

      A:

      No, as long as the area remains clean.

      Answered on 11/10/2010 by PexSupply Staff from NY
Displaying questions 1-2

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