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Stuffing-box sealing unit US+PwP

Item 1. Standard sealing ring US (sealing part – material: thermoplastic polyurethane TPU, hardness 90±2 ShA)
Item 2. Anti-extrusion and guide ring PwP (material: polyacetal POM)

Conditions of use

Operating pressure [MPa] 16 25 50
Continuous exposure temperature [°C] 80 50
Smax.     G=2.5 [mm] 1.0 0.75
Hydraulic medium:
  • mineral oils
  • oil-water emulsions class HFA and HFB (up to temp. 50 °C)
Maximum operating speed [m/s]:
  • continuous 0.2
  • intermittent 0.5

Ordering example​​​

US+PwP Ring 40×50×8 – 7.5
(D × d × W – W₁)

Comments

  1. The geometric features of PwP rings provided in the table are minimum values. They may be manufactured in versions with an increased dimension W₁ or increased thickness G₁, while maintaining the relationship W₁ ≥ 1.5G₁.
  2. Custom seal versions are available:
    • for continuous operation (in oil) at temperatures up to 100 °C,
    • with nominal dimensions other than those specified in the standard range.
 
Type/Size
dxdxW-W₁		 Rod working diameterd US ring groove ext. diameterD PwP ring groove ext. diameterD₁ US ring widthW US ring groove widthL PwP ring groove widthM=W*₁ PwP ring profile heightG₁ Assembly chamfera
40×50×8–W₁40504589≥7.52.56
50×60×8–W₁50605589≥7.52.56
56×66×8–W₁56666189≥7.52.56
63×73×8–W₁63736889≥7.52.56
65×75×8–W₁65757089≥7.52.56
70×80×8–W₁70807589≥7.52.56
80×90×8–W₁80908589≥7.52.56
90×100×8–W₁901009589≥7.52.56
100×115×12–W₁1001151051213≥102.58.5
105×120×12–W₁1051201101213≥102.58.5
110×125×12–W₁1101251151213≥102.58.5
125×140×12–W₁1251401301213≥102.58.5
140×160×15–W₁1401601451516.5≥102.59.5
150×170×15–W₁1501701551516.5≥102.59.5
180×200×15–W₁1802001851516.5≥102.510.5
190×210×15–W₁1902101951516.5≥102.510.5
200×220×15–W₁2002202051516.5≥102.510.5
240×260×15–W₁2402602451516.5≥102.512.5
250×270×15–W₁2502702551516.5≥102.512.5
255×275×15–W₁2552752601516.5≥102.512.5
260×280×15–W₁2602802651516.5≥102.512.5
265×285×15–W₁2652852701516.5≥102.512.5
270×290×15–W₁2702902751516.5≥102.512.5
280×300×15–W₁2803002851516.5≥102.512.5
285×305×15–W₁2853052901516.5≥102.512.5
290×310×15–W₁2903102951516.5≥102.512.5
295×315×15–W₁2953153001516.5≥102.512.5
300×320×15–W₁3003203051516.5≥102.514.5
305×325×15–W₁3053253101516.5≥102.514.5
320×340×15–W₁3203403251516.5≥102.514.5
325×345×15–W₁3253453301516.5≥102.514.5
335×355×15–W₁3353553401516.5≥102.514.5
350×370×15–W₁3503703551516.5≥102.514.5
370×390×15–W₁3703903751516.5≥102.514.5
380×400×15–W₁3804003851516.5≥102.514.5
Type/Size
dxdxW-W₁		 Rod working diameterd US ring groove ext. diameterD PwP ring groove ext. diameterD₁ US ring widthW US ring groove widthL PwP ring groove widthM=W*₁ PwP ring profile heightG₁ Assembly chamfera
100×110×12–W₁1001101051213≥102.58.5
105×115×12–W₁1051151101213≥102.58.5
110×120×12–W₁1101201151213≥102.58.5
115×125×12–W₁1151251201213≥102.58.5
125×135×12–W₁1251351301213≥102.58.5
130×140×12–W₁1301401351213≥102.58.5
140×155×15–W₁1401551451516.5≥102.59.5
145×160×15–W₁1451601501516.5≥102.59.5
150×165×15–W₁1501651551516.5≥102.59.5
155×170×15–W₁1551701601516.5≥102.59.5
180×195×15–W₁1801951851516.5≥102.510.5
185×200×15–W₁1852001901516.5≥102.510.5
190×205×15–W₁1902051951516.5≥102.510.5
195×210×15–W₁1952102001516.5≥102.510.5
200×215×15–W₁2002152051516.5≥102.510.5
205×220×15–W₁2052202101516.5≥102.510.5
220×235×15–W₁2202352251516.5≥102.510.5
235×250×15–W₁2352502401516.5≥102.510.5
240×255×15–W₁2402552451516.5≥102.510.5
250×265×15–W₁2502652551516.5≥102.510.5
255×270×15–W₁2552702601516.5≥102.510.5
260×275×15–W₁2602752651516.5≥102.510.5
265×280×15–W₁2652802701516.5≥102.510.5
270×285×15–W₁2702852751516.5≥102.510.5
275×290×15–W₁2752902801516.5≥102.510.5
Type/Size
dxdxW-W₁		 Rod working diameterd US ring groove ext. diameterD PwP ring groove ext. diameterD₁ US ring widthW US ring groove widthL PwP ring groove widthM=W*₁ PwP ring profile heightG₁ Assembly chamfera
280×295×15–W₁2802952851516.5≥102.510.5
285×300×15–W₁2853002901516.5≥102.510.5
290×305×15–W₁2903052951516.5≥102.510.5
295×310×15–W₁2953103001516.5≥102.510.5
300×315×15–W₁3003153051516.5≥102.512.5
305×320×15–W₁3053203101516.5≥102.512.5
310×325×15–W₁3103253151516.5≥102.512.5
320×335×15–W₁3203353251516.5≥102.512.5
325×340×15–W₁3253403301516.5≥102.512.5
330×345×15–W₁3303453351516.5≥102.512.5
335×350×15–W₁3353503401516.5≥102.512.5
340×355×15–W₁3403553451516.5≥102.512.5
345×360×15–W₁3453603501516.5≥102.512.5
350×365×15–W₁3503653551516.5≥102.512.5
355×370×15–W₁3553703601516.5≥102.512.5
360×375×15–W₁3603753651516.5≥102.512.5
365×380×15–W₁3653803701516.5≥102.512.5
370×385×15–W₁3703853751516.5≥102.512.5
375×390×15–W₁3753903801516.5≥102.512.5
380×395×15–W₁3803953851516.5≥102.512.5
385×400×15–W₁3854003901516.5≥102.512.5
390×405×15–W₁3904053951516.5≥102.512.5