The PTA profile is a double acting composite wiper seal composed of a filled PTFE friction ring with a sealing edge and a wiper edge,as well as two O-Rings as pre-load components. Double wiper for improvement of overall tightness, PTA is fitted preferably in combination with our rod seals. We recommend a bore hold for relieving pressure. No pressure release is needed for these seals with a good pump-back action. Where there is a combination of seals without sufficient pump-back capability a pressure-relieving hole is required. Morgan low friction wiper PTA is preferably fitted in combination with our rod seals OD series, B3 series or USR series
The size and tolerance of the groove and the product of the PTA dust ring comply with the PTI standard series of Merkel Company and WEMHF standard series of Trelleborg Company.
|Medias||Mineral hydraulic oils|
Others (contact our experts)
Injection molding machines
Control and regulating apparatus
NBR 70 Shore A
FKM 70 Shore A
• Excellent abrasion and wear resistance
• Low friction coefficient; no stick-slip effect
• Excellent regulation and positioning in operation
• Very good wiping effect against external pollutions
• High reliability, can accept the full operating pressure for short periods.
• Material variants for short stroke and high frequency; available on enquiry
• Wide temperature range and excellent chemical resistance, depending on the materials selected
|Groove diameter||Bore diameter||Seal height||Groove width||Step width||O'Rings|
|Standard series||Extended series||ØD1 H9||ØD2 H11||H1||L1 0/+0.20||L2 min||Ød2|
|19.0 - 39.9||19.0 - 130.0||d1 + 7.60||d1 + 1.00||4.00||4.20||3.00||1.78|
|40.0 - 69.9||30.0 - 250.0||d1 + 8.80||d1 + 1.50||6.00||6.30||3.00||2.62|
|70.0 - 139.9||50.0 - 450.0||d1 + 12.20||d1 + 2.00||7.70||8.10||4.00||3.53|
|140.0 - 399.9||80.0 - 650.0||d1 + 16.00||d1 + 2.00||11.00||11.50||5.00||5.33|
|400.0 - 649.9||180.0 - 650.0||d1 + 24.00||d1 + 2.50||14.80||15.50||8.00||6.99|
|650.0 - 999.9||300.0 - 999.9||d1 + 27.30||d1 + 2.50||17.20||18.00||10.00||8.40|
|Roughness||Dynamic surface area||Static surface area||Groove flanks|
|Ra||0.05 - 0.2 µm||≤ 1.6 µm||≤ 3.2 µm|
|Rz||0.4 - 1.6 µm||≤ 6.3 µm||≤ 10.0 µm|
|Rmax||0.63 - 2.5 µm||≤ 10.0 µm||≤ 16.0 µm|
ChamferThe chamfer length as well as the chamfer angle are determined by the rod seal.
Morgan Seals has the biggest vulcanizing machine(4000T) and different kinds of seal moulds. So for the large dimension and non standard wiper seals, please do not hesitate to contact with us. The following is the the picture of Morgan production line and warehouse:
Guangzhou Morgan Seals Co., Ltd the expert in sealing solution field who combines the rich seals research and production experience of her parent firm with the advanced technology and administration of Morgan, Worcester. Morgan Seals Research and Development ability is based on her parent firm who has won awards as scientific research achievements for more than 1000 projects and over 200 of them won scientific and technological progress prizes of municipal, provincial, ministerial and national levels. At the same time, it also has one National Certified Laboratory, one National Engineering Research Centers and three Industry Level Inspection Centers.