0203 113 2122 Mon-Fri 7:30am-10:00pm Sat 8:00am-5:30pmSun 2:00pm-8:00pm

inc VAT

Big Brands at Trade Prices
Choose from over 50,000 product lines
Free Delivery on All Products *

FREE Delivery

Free Delivery on UK Mainland Orders, Delivery to Scotland, Northern Ireland and Outlying Islands may Require an Extra Charge.

Danfoss Randall AVDO15 15mm Straight Automatic By-Pass Valve

£100.90 inc VAT
£105.10 SAVE: £4.20
Available In Stock
- +
Write a Review

  • Reference:
  • Brand: Danfoss
  • Manufacturer Reference: 003L611500
  • Delivery: Approx 5 Working Days
  • Condition: New
  • 1 years guarantee
  • Highest Trustscore

Code Description Inc. VAT Excl. VAT
PAVDO15 - Danfoss Randall AVDO15 15mm Straight Automatic By-Pass Valve £100.90 £84.08

The AVDO range of automatic bypass valves can be used as either differential pressure controls or to provide a minimum flow through a system. Many boiler manufacturers are now insisting that a bypass be fitted in all installations to ensure that the volume of water circulating through the boiler does not fall to below a predefined minimum, regardless of the load on the system. Recognising the energy efficiency advantage of such controls the Building Regulations now require in both new-build and boiler replacement contexts, where a bypass is specified by the boiler manufacturer, that an automatic bypass is fitted. Automatic bypass valves improve system efficiency by opening only when there is a need to bypass water, this usually occurs at times of part load when radiator thermostats in the system are partly closed and water flow around the boiler is restricted. In addition to ensuring adequate flow around the boiler, automatic bypass valves also prevent pump pressure from climbing significantly above design levels, thus reducing the risk of noise in the system. Available in a variety of sizes, the capacity of this range of valves is very high with large but linear changes in water throughput for relatively small increases in differential pressure. This allows a 15mm valve to be used in situations where 22mm valves are normally required.
  • Easy to set, self acting flow controller
  • Opens on rising differential pressure
  • DN15, DN20, DN25
  • Setting range of 0.05 to 0.5 bar
  • Internal/External thread variants
  • Improves system efficiency
  • Maintains minimum flow rates through boiler and pump
  • Essential in low water content boiler systems
Setting Range0.05 - 0.5 bar
Connection Inlet15 mm
Connection Outlet15 mm
Max. Differential Pressure0.5 bar
Max. Flow Temperature100 ° C
Max. Working Pressure10 bar

Danfoss Randall AVDO15 15mm Straight Automatic By-Pass Valve

Available In Stock

You may also like


We accept the following payment methods on

© | Pioneer Bathrooms Ltd - Address: 9 Dennis Lane, Stanmore, Middlesex, HA7 4JR - Phone: 0203 113 2122