Solar Water Heater Sealed Rubber is Important or Not ?

A rounded O-ring shape elastomer is designed for properly sealing two joints during groove and compression. Because it has a circular cross-section shape that is called O-ring sealing rubber, it was introduced in the 19th century when it was used as the sealing element of the steam engine cylinder. They are specially designed to seal under the specified temperature, pressure, and different liquid and gas media in the static or moving state.

Sealed Rubber, as its name implies the name is used to be seated between two points that protect any gas and fluid leakage. Its assembly simply prevents fluids or air from passing from one part to another. A simple rubber ring is essential equipment while installing any components for perfect finishing and helps protect from leaks and product failure.

The short answer is yes; sealed rubber is essential to use in solar water systems or other applications to prevent damage due to fluid or air leakages. Keep scrolling down and read all about sealed rubber; Water Heater Sealed Rubber Is Important or Not? What? Where, why, and when we used it.

What Material is Used in Sealed Rubber Construction?

The sealed Rubber is constructed in different styles and shapes using different types of material used for specific purposes. Each ring sealed Rubber has different properties.

A sealed Rubber manufacturing according to multiple techniques like extrusion, compression molding, injection molding, transfer molding, or machining. It depends on the application where you used it.

They are made with a different plethora of materials: silicone, nitrile rubber, polyurethane, neoprene, fluorocarbon as well as other elastomers. The construction is done by different factors such as cost, application temperature, quantity, quality, sealing pressure, chemical compatibility, movement, action, lubrication, and other requirements.

Here listing some essential rubber materials that are common for making rubber sealed.  

  1. Fluoroelastomer:

                    This type of sealed Rubber is Often used in heating applications like solar heaters, electric heaters, or gas heating systems. These fluoroelastomers come in O ring shape and are constructed of high-quality material that compresses elements to make them strong enough for heat-resistant. These sealed Rubber are highly durable and long-lasting for any heating application and provide a firm grip to prevent any pressure of Gas and air.

  • Silicone rubber: 

                     Silicone rubber and soft and spongy rubber. This also has a round ring shape which is commonly used in daily life to cover up things. Silicon rubber construction is non-toxic; that’s why it’s commonly used in the food service industry because they are safe and have no chemical properties.

  • Ethylene propylene diene monomer:

                     These types of O ring sealed Rubber are unsuitable for lubricants or fuels. The ethylene propylene diene monomer is highly sturdy, strong, and resistant to moisture, steam, silicone, and grease. These types of sealed rubber mainly used high-level electric machines.

  • Thermoplastic polyurethane:

                   This is also a strong and durable material that offers a high level of tensile strength. The purpose of using thermoplastic polyurethane rubber is to resist degradation.

What is Sealing Pressure?

When you select a rounded rubber for sealing anything, it’s crucial to know the maximum account of pressure the rubber can bear.

The purpose of designing the rubber in a ring shape is to set it into two holes where the chances of leaks of air, gases, or fluid. The rubber naturally compresses when installed between two working surfaces. If the pressure is too high, the ring cannot bear it though it may fail. So, the rubber seal has predefined their quality, how much pressure it can work under, and its capabilities for different applications. Some Sealed can seal up to 5,000 pounds per square inch (PSI). Most manufacturers don’t prefer to seal the surface at this extremely high pressure, but this still attests to the sealing power of O-rings.

Where is the Sealed Rubber commonly Used?

Sealed rubber has different varieties according to application usage. Here we share some common applications where any shape of sealed rubber commonly used as a piece of essential equipment follows.

Common Applications

  • Oil, Gas & Industrial__ the most common purpose of the rubber-sealed ring is for Solar water heater installation like Valves, gas pumps, fittings, dispensers, and storage tanks need sealing solutions. That helps to protect the system from any leaks and makes it highly durable to withstand extreme temperatures, harmful chemicals, and high compression.
  • Transportation__The primary purpose of sealed rubber is commonly found in the transportation field. Heavy and automotive duty trucks that serve chemical exposure, extreme temperatures, and vibration are all factors that affect elastomer selection for ring rubber.
  • Medical__ is an FDA-grade O-ring rubber used in the medical field, such as used in manufacturing the syringe, pumps, filtration, and connectors.
  • Electronics__ sealed rubber is also used in dust-protecting products like electronics products for cleaning environments.
  • Food & Beverage__ the O-ring sealed rubber is ideal for food processing, water filtration, and beverage dispensing.

Structure of Sealed Rubber

It has many shapes with different materials. But standard sealed rubber has an O-ring or donuts-shaped loop that fits between two joints and avoids the flow of liquids or gases. The purpose of using the ring seal is to block the specific part of the device where the chances of the leak might occur in the future. It’s one of the simplest precision mechanical parts ever produced and continues to be one of the most commonly used sealing products. The most successfully used in a wide temperature range and a variety of fluids to avert leakage and penetration of external environmental media and dust.

The rubber quality and size are chosen according to the device and contact mediums. They are made from PTFE, thermoplastic materials, metals, both hollow solid. Undoubtedly, it is one of the best solutions to control leaked problems for static, dynamic, hydraulic, and pneumatic parts, making them a highly flexible solution for vast engineering applications.

Advantages of Sealed Rubber or O-Rings

  • Simple and durable
  • Minimal footprint
  • Compact design
  • Easy installed
  • It has a self-sealing effect.
  • No required regular adjustment
  • Good sealing performance for solar heating systems such as valves and storage tanks.
  •  It is a deal for conditions where the strain varies.
  • It is used for many different sealing media: oil, water, gas, chemical media, or other mixed media.
  • A Best suited rubber material and proper formula design can effectively seal oil, water, air, gas, and various chemical media.
  • It helps to control the temperature range is wide (-60℃ – +220℃)
  • In fixed use, a sealed rubber control pressure can reach 1500Kg/cm2 (used together with a reinforcing ring).
  • Convenient assembly and disassembly.
  • They are well sealed for a wide range of pressure, temperature, and tolerance.
  • Cost-effective and can be reused.


  • Not performing well in high resistant initial friction. It is challenging to control leakage.

How much Temperature can a Silicone Sealed Rubber be able to control?

Silicone O-rings perform well between -84-232°C, with some types of silicone able to handle temperatures as high as 300°C or as low as -115 (175°F) for shorter periods. Commonly used in fuel injection ports exposed to high temperatures and also involved in petroleum-based fluids, steam, and water.

What’s the Difference Between a Gasket and a Seal?

Gaskets and rubber both are the same thing, and both are used for the same function to avoid leaking. Gaskets and seals have different applications. The difference is only the gaskets serve as a static seal between flat surfaces, such as joints. In contrast, seals are mainly used in dynamic environments between active components such as heating systems, rotating shafts, pumps, and engines.

What Is a Gasket?

A gasket is a sheet or ring composed of a supple material used typically in static applications to seal joints, flanges, and other mating surfaces to prevent leakage.

What Is a Seal?

Rubber seals come in a broader category, such as o-rings, valve stem seals, rotary seals, and mechanical seals. Unlike gaskets that are mostly used for static applications. Sealed used in active environments in the heater, hot water system, electric motors, engines, pumps, and rotary shafts. Sealed might be round and flat with a tilted inner ring of rubber surrounded by an outer metal ring that helps prevent leakage in dynamic applications.

Seals are typically used to prevent leaks between two parts. The sealed and gasket are both made of a wide variety of materials depending on the applications for which they will be used. Some of the common materials include:

  • Thermoplastic Rubber (TPR)
  • Nitrile
  • EPDM
  • Fluorosilicone
  • Fluoroelastomer
  • Polyisoprene
  • Neoprene
  • Polyurethane
  • Silicone

Why consider Friction in Sealed Rubber? 

Basically, the Friction considerations are essential in dynamic applications in movement situations, the friction generated which may cause failure due to abrasion or extrusion and successive nibbling of the seal. So, ensure that the proper groove design, appropriate lubrication, and operation speed can help avoid these issues while installing the rubber. We suggest avoiding using Silicone, and Fluorosilicone is often avoided in dynamic applications due to its low tear resistance.

Why consider temperature and pressure in Sealed Rubber construction? 

The temperature and pressure consideration is crucial while installing a rubber seal into the solar heating system. The excessive heat and pressure may cause inappropriate rubber seal materials to be stiff and swollen and deteriorate physically or chemically over time. Furthermore, overly cold temperatures may cause material shrinkage and leakage due to loss of seal contact or insufficient compressive force due to stiffening of the rubber compound.

Excessively high pressures can cause softer sealed rubber materials to extrude into the diametrical gap. In that case, the sealed permanent failure and subsequent leakage. So,

The temperature, pressure, and the length of exposure should also be considered. And prevent seal materials that operate optimally within the expected temperature range should be selected.

What causes the rubber to deteriorate?

Rubber is a wonderfully helpful and malleable material. Rubber degradation can occur due to common environmental factors like light, heat, pressure, or ozone. The most common causes of Deterioration are exposure to light, oxygen (ozone), and heat. Oxidative and thermal aging of rubber is accelerated by stress and reactive gases, like ozone, resulting in cracking, charring, and color fading. However, anti ozone and UV stabilizers can slow or prevent these issues.

Why did we use sealed Rubber in the Solar Water heating system?

Solar panels are important and valuable equipment that is most popular in cold areas where hot water demands a lot. The installation of solar systems is very typical. You should be aware of each and every part and how to do the installation for long-lasting perfectly, and we’ll perform. It’s essential to know how a solar panel installation has been very fast, particularly roof-mounted solar systems for businesses and residences. A sealed rubber is used for different purposes in the solar system, such as The primary purpose to prevent storage tank leakages, and the other is for the solar system to stay firmly on a roof. There is a tight, waterproof seal around the mounting bolt or screw. They have different designs and shapes to perform specific functions.

A sealed rubber is used to guarantee a water-tight installation and other types are best to avoid air and water leaking from the storage tank and valve system. A silicone silica sealing o-ring is also used for solar water heater vacuum tubes to make a strong grip and never lose them.

How to Install a Sealed Rubber?

It’s easy and most simple to install sealed rubber using your own techniques. So, before starting, you must consciously read how to install sealed rubber without damaging it.

So, first, clean the seal if you are reusing it or otherwise coat a small amount of lubricant on the seal slightly. Now clean the equipment where you want to fix it and make sure to cover any sharp edges on the parts that may come into contact with the sealed rubber. It will help prevent the Sealed from being damaged during the installation process.

Make sure before applying dead starch it properly makes sure it should stretch no more than 50% and scratches all sides uniformly rather than just one side.

After fixing the specific point, ensure the seal is not twisted inside the groove. If installing a backup rubber, make sure to do it on the low-pressure side of the system so that the high pressure will push the O-ring against the backup rather than away from it.

Tips for O-Ring Sealed Rubber Installation

Here are some helpful tips to ensure a perfect rubber installation.

  • It will be suitable for the rubber seal to tear during installation and can be avoided by covering the threads with masking tape and lubricant.
  • It would be best if you covered sharp corners that can cause tears in the seal, and even small tears can break the seal.
  • Stretching the O-ring evenly from all sides helps to make a more potent and durable final seal.
  • Remember, never roll the Sealed down shaft that might be damaged during installation.
  • Fit the component’s lead inside the chamfer increases the safety of the sealed rubber.

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