SKU: 88133923609

APO FPV 15mm Solar Anti Frost Protection Valve

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Description

APO FPV 15mm Solar Anti Frost Protection ValveOverview The APO Anti Frost Protection Valve FPV is designed to protect solar collector panels from frost damages. The APO FPV is compatible and a direct swap for other brands such as AVG and Caleffi frost protection valves. The FPV anti frost valve employs a wax filled piston inside coupled with a spring to open or shut the valve. The wax will contract or expand according to the ambient air temperature in order to move the piston. To extend the APO

Overview

The APO Anti Frost Protection Valve FPV is designed to protect solar collector panels from frost damages. The APO FPV is compatible and a direct swap for other brands such as AVG and Caleffi frost protection valves.

 

The FPV anti frost valve employs a wax filled piston inside coupled with a spring to open or shut the valve. The wax will contract or expand according to the ambient air temperature in order to move the piston. To extend the APO FPV anti frost valve service life span, an optional 100mm "dead leg" extension fitting as shown in the last few photos is offered at an extra cost and is highly recommended.

 

When a frost condition is present, the wax contracts sufficiently enough to compress the string and open the FPV valve seat causing a water leakage from the solar hot water panels. The hot water from the storage tank will move into the solar panels to fill the void from the leakage. This warm water will in turn heat up the solar panels and protect the panels from freezing. At the same time the FPV anti frost valve heats up itself with the solar panels from the hot water, until the FPV piston shuts off the leakage by closing the valve sealing seat, as the wax in the piston expands. The cycle will then repeat when the solar panels slowly lose heat and the FPV anti frost valve opens again. 

 

Unfortunately, this piston/wax mechanism can often be damaged by the extreme heat generated by the solar panels during the summer. When the first frost comes in winter, the valve will usually fail to automatically shut off and cause non-stop water leakage from the roof. The "dead leg" extension fitting keeps the FPV anti frost valve further away from the panel and protect the valve from the heat. The FPV life span is significantly extended. In fact, some other manufacturers such as Caleffi will require such 100mm extension for their anti frost valves' warranty to be honored. 

 

Only one APO FPV anti frost valve is required for one solar hot water system with 2 or 3 solar panels. The FPV anti frost valve should only be installed at the bottom of the solar panels opposite to the cold water inlet, where the temperature is lowest. It is recommended to only use the supplied red fiber glass washer gasket and use the optional rubber seal included as a spare when used on the solar panels. Being installed at the right angle corner of the solar hot water panels, debris can accumulate inside the valve body and hence FPV frost valve should be flushed out periodically every 2 years as a maintenance schedule.

 

 

Technical Details

  • Manufacturer: APO
  • Model: FPV
  • Thread Size: 1/2" BSP (15mm) female swivel loose nut
  • Physical Thread Size Measurement: 20.995mm internal diameter (Please refer to the BSP sizing chart in the photo gallery)
  • Material: Lead Free DR Brass and Stainless Steel
  • Activation Temperature: 3-5 deg 
  • Optional Dead Leg Extension Fitting: Watermark Approved DR Brass
  • Intended Use: Solar water heaters in frost prone area
  • SKU: APO-FPV & APO-FPV-E

 

Package Contents

  • APO FPV anti frost valve with optional 100mm extension 
  • Package weight 210g (380g with the extension fitting)

 

 

Shipping Notes
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SKU: 88133923609

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4.9 ★★★★★
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David
Birmingham, US
★★★★★ 4
Its a story about a family who strive to survive and good history that people can learning concern how can you do in this disasters
Format: Kindle
I can recommended this books for persons who are learning English like me its a good grammar and execelents composition for everyone that wants to learn and good summary for guidance about fires
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Reviewed in the United States on December 5, 2020
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Sandra K. Stiles
Lexington, US
★★★★★ 5
Excellent Adventure
Format: Paperback
For a small book this packs a powerful punch. Fourteen year old Troy is left in charge of his younger sister while his parents are away for twenty-four hours. Troy wakes to his cell phone ringing, his dog tugging on his sleeve and pitch blackness. Unable to reach their parents Troy goes next door to the neighbor for advice. Mrs. Jones makes it clear they should stay put. When Troy sees houses on their street erupt in flames he decides they have to leave. Unfortunately he can’t convince Mrs. Jones. Troy loads up his sister and their two pets in their dad’s Bronco and heads for what he hopes is safety. This book is full of realistic action between the older brother and younger sister. He takes his promise to his parents to protect his sister even when she becomes annoying. This is fast paced, on the seat of your chair action from the very beginning. For those who are fans of the “I Survived “ series by Lauren Tarshis, I guarantee that you will enjoy this series. I highly recommend this to all adventure readers.
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Reviewed in the United States on May 24, 2020
E
Verified Purchase
EMY
Battle Creek, US
★★★★★ 5
Very exciting story
Format: Paperback
Paradise is where my parents retired and are buried. The house they lived in burned down in the fire after 34 years of wonderful memories with my husband and our 3 children. We are just so grateful that my parents died before the fire, my dad being the last in 2016 at over 100 years old. Our youngest son has autism and trouble reading so this was the perfect book to have him read to me. It’s just at his reading level and was a very exciting story. We appreciate all of the facts about the fire the author put in the last pages of this book, too.
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Reviewed in the United States on March 1, 2020
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Kindle Customer
Charlottesville, US
★★★★★ 5
Fast Pace Scary Read
Format: Kindle
A short read that grabs your heart strings from the beginning and doesn't stop until the very end. You can feel the terror, the fear, the fire and smell the smoke as the kids run for their lives. You cheer the kids on scared for them and the pets. My heart racing, tears forming, worry working its way in, do they make it? Read this book to find out. Kudos to the authors for excellent writing. A book all should read and discuss with their families!!!
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Reviewed in the United States on August 10, 2019
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Shelly Arrenquin
Massapequa, US
★★★★★ 5
Grabs Your Attention from the Start
Format: Paperback
Well written and definitely grabs and keeps your attention. I read it in one sitting. So did my mom and sister. Just a warning, this book did trigger some anxiety for me because of the fire. It uses actual street names and timeframes. We love to read the “I Survived” series to my son and this one was better in my opinion but I have ties to Paradise.
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Reviewed in the United States on October 11, 2020

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