AH Type 2 MECO Seal
The MECO AH Type-2 model is the best choice for fitting a split seal in limited space on small to large shaft diameters. The configuration is a double mechanical seal using an elastomer drive to rotate bearing-grade synthetic seal faces against fixed, stainless steel seal faces.
The AH Type-2 uses a barrier fluid to pneumatically load the seal faces and isolate the process from the atmosphere. The AH Type-2 is suited for MRO and OEM equipment.AH Type 2 MECO Seal Datahseet
The seal cavity is typically charged with compressed gas, which acts as a barrier fluid to provide pneumatic seal face loading. The two stator housings are typically separated by a stack of 1/64" (0.40mm) thick shims to provide a method of adjustment.
The seal cavity is charged with low pressure air or gas, which acts both as a barrier fluid and provides pneumatic seal loading. An access port is typically provided so the seal can be blown free of contaminants. A drop in seal cavity pressure indicates a need to inspect the seal. Pressure can be restored to normal by removing an adjusting shim, replacing the drive elastomer, or, if rotating faces are worn, by rebuilding the seal.
The AH Type-2AP (not shown) uses one or two 1/8" (3mm) thick stainless steel stator(s) with an extra-thick central housing or stator. Space, assembly and equipment restrictions dictate the need for the AH Type-2AP approach.
The common rotor seal face material is MECO 3000, a high-performance, bearing-grade, polymer-filled PTFE with FDA approval. Other options are: bearing grade PEEK; ceramic filled PTFE; virgin PTFE & UHMW. The different elastomer options available are Silicone, Viton®, EPDM and Nitrile, with all having an FDA-compliant option.
Since Woodex’s MECO Seal division manufactures many custom shaft seal models, they have the capacity to fabricate from any material required. If looking for an "off-the-shelf" version of the sealing approach, please check the MECO HB model seal as a viable option.
Viton® is a registered trademark of E.I. Dupont de Nemours & Company
|Temperature||-60° to 500° F (-50° to 260° C) Less on large shafts.|
|Pressure||Vacuum to +20 psig (140 kPa)
||Up to 600 SFM (200 m/min) without cooling. Less on small shafts.
|Total Indicator Runout (TIR)
||1/4" (6mm) standard; greater runout can be accommodated
|Barrier Fluid Options
||Air or Inert Gas, grease, Occasional water flush.|
|Results vary with conditions - call for FTL discussion.|