The inner retaining ring increases the axial rigidity and resilience of the gasket. Its purpose is to help avoid excessive compression due to high seating stress in high-pressure service and to reduce turbulence in the flange area. The advantages to using an inner ring include the following: Provides additional compression stop and blowout resistance, prevents build up of process fluid, minimizes erosion and turbulence, shields the gasket, prevents buckling and promotes tightness. To view our line of Spiral Wound Gaskets, click here.
Gaskets are by far the most versatile seal, with different shapes, materials, coatings, methods, etc. Depending on the type of material chosen, they can seal at a wide range of temperatures and pressures. Click here to view our line of gasket products.
It is not always realistic to repair or adjust the misalignment of flanges. So, if flanges are corroded, uneven or not parallel, a thicker gasket may be recommended because of their compression capabilities.
So why do most gasket manufacturers recommend using thinner gaskets wherever possible?
Thinner gaskets offer many advantages:
- Greater blow-out resistance and lower leakage rates due to the smaller cross-sectional area exposed to the internal medium pressure.
- Environmental concerns
- Better compressive strength and therefore higher gasket surface loads (pressure) can be safely applied to a thinner gasket.
- Better fastener torque retention due to the lower creep relaxation characteristics of thinner gaskets.
- Lower cost of the gasket itself.
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A gasket may last 5 years, or it could last 20 years. Here is some insight into factors that will give your gasket the best chance at a long and prosperous life between the flanges. Read more here.
Symptoms include noise, vibration and hammering pipe sounds which can result in flange breakage, equipment damage, ruptured piping and damage to pipe supports. Whenever incompressible fluids exist in a piping system, the potential exists for water hammer.
The risks of water hammer developing are particularly high when:
- The velocity of the fluid is high
- There is a large mass of fluid moving and/or when there are large elevation changes within the piping systems
Since a swing check must rely on gravity and/or fluid flow to help it close, flow reversal must occur before closure begins. When a swing check finally closes, it abruptly stops the flow and causes a pressure surge resulting in shock waves. These shock waves continue until the energy generated from this sudden action dissipates.
Silent check valves do not rely on gravity or fluid flow for their closure. Instead, as the forward velocity of the fluid slows, the spring assist on the valve starts to close the disc. Due to the spring assist and the relatively short distance the disc must travel, by the time the forward velocity has decreased to zero, the valve disc has reached the seat and the valve is closed. With reverse flow eliminated, the forces necessary to produce water hammer on both the upstream and downstream sides of the valves are substantially eliminated. View our line of check valves.
Sometimes the torque values aren’t followed, or a material gets replaced, and flange surfaces change throughout the repetitive heat cycles. When this happens, you must trust the performance of your gasket material. In some cases, over-compression can happen, and that can lead to problems. View our gasket installation video to learn more.
A full-face gasket covers the entire face of the flange. Full-face gaskets are typically used on flat face flanges and are cut with bolt holes which allow the insertion of the flange bolts through the gasket. When installing full-face gaskets, the joint must be completely disassembled. View our full product line now.
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