| NO | ØD | Ød | B | C | R1 |
|---|---|---|---|---|---|
| JP-12*7.1*2.2 HPO3 | 12 | 7.1 | 2.2 | 3 | 0.5 |
| JP-30*19.3*4.2 HPO3 | 30 | 19.3 | 4.2 | 6 | 1 |
| JP-32*21.3*4.2 HPO3 | 32 | 21.3 | 4.2 | 6 | 1 |
| JP-40*29.3*4.2 HPO3 | 40 | 29.3 | 4.2 | 6 | 1 |
| JP-50*39.3*4.2 HPO3 | 50 | 39.3 | 4.2 | 6 | 1 |
| JP-60*44.9*6.3 HPO3 | 60 | 44.9 | 6.3 | 8 | 1.3 |
| JP-60*49.3*4.2 HPO3 | 60 | 49.3 | 4.2 | 6 | 1 |
| JP-63*47.9*6.3 HPO3 | 63 | 47.9 | 6.3 | 8 | 1.3 |
| JP-70*54.9*6.3 HPO3 | 70 | 54.9 | 6.3 | 8 | 1.3 |
| JP-70*59.3*4.2 HPO3 | 70 | 59.3 | 4.2 | 6 | 1 |
| JP-75*59.9*6.3 HPO3 | 75 | 59.9 | 6.3 | 8 | 1.3 |
| JP-75*64*4.2 HPO3 | 75 | 64 | 4.2 | 6 | 1 |
| JP-80*64.9*6.3 HPO3 | 80 | 64.9 | 6.3 | 8 | 1.3 |
| JP-85*69.9*6.3 HPO3 | 85 | 69.9 | 6.3 | 8 | 1.3 |
| JP-90*74.9*6.3 HPO3 | 90 | 74.9 | 6.3 | 8 | 1.3 |
| JP-95*79.9*6.3 HPO3 | 95 | 79.9 | 6.3 | 8 | 1.3 |
| JP-100*84.9*6.3 HPO3 | 100 | 84.9 | 6.3 | 8 | 1.3 |
| JP-110*94.9*6.3 HPO3 | 110 | 94.9 | 6.3 | 8 | 1.3 |
| JP-115*99.9*6.3 HPO3 | 115 | 99.9 | 6.3 | 8 | 1.3 |
| JP-120*104.9*6.3 HPO3 | 120 | 104.9 | 6.3 | 8 | 1.3 |
| JP-125*109.9*6.3 HPO3 | 125 | 109.9 | 6.3 | 8 | 1.3 |
| JP-130*109.5*8.1 HPO3 | 130 | 109.5 | 8.1 | 10.25 | 1.8 |
| JP-130*114.9*6.3 HPO3 | 130 | 114.9 | 6.3 | 8 | 1.3 |
| JP-140*124.9*6.3 HPO3 | 140 | 124.9 | 6.3 | 8 | 1.3 |
| JP-150*134.5*6.3 HPO3 | 150 | 134.5 | 6.3 | 8 | 1.3 |
| JP-150*134.9*6.3 HPO3 | 150 | 134.9 | 6.3 | 8 | 1.3 |
| JP-160*139.5*8.1 HPO3 | 160 | 139.5 | 8.1 | 10.25 | 1.8 |
| JP-160*144.9*6.3 HPO3 | 160 | 144.9 | 6.3 | 8 | 1.3 |
| JP-170*154.9*6.3 HPO3 | 170 | 154.9 | 6.3 | 8 | 1.3 |
| JP-180*159.5*8.1 HPO3 | 180 | 159.5 | 8.1 | 10.25 | 1.8 |
| JP-180*164.9*6.3 HPO3 | 180 | 164.9 | 6.3 | 8 | 1.3 |
| JP-190*174.9*6.3 HPO3 | 190 | 174.9 | 6.3 | 8 | 1.3 |
| JP-200*179.5*8.1 HPO3 | 200 | 179.5 | 8.1 | 10.25 | 1.8 |
| JP-210*189.5*8.1 HPO3 | 210 | 189.5 | 8.1 | 10.25 | 1.8 |
| JP-220*199.5*8.1 HPO3 | 220 | 199.5 | 8.1 | 10.25 | 1.8 |
| JP-225*204.5*8.1 HPO3 | 225 | 204.5 | 8.1 | 10.25 | 1.8 |
| JP-228*217.3*4.2 HPO3 | 228 | 217.3 | 4.2 | 6 | 1 |
| JP-230*209.5*8.1 HPO3 | 230 | 209.5 | 8.1 | 10.25 | 1.8 |
| JP-240*219.5*8.1 HPO3 | 240 | 219.5 | 8.1 | 10.25 | 1.8 |
| JP-240*229.3*4.2 HPO3 | 240 | 229.3 | 4.2 | 6 | 1 |
| JP-250*229.5*8.1 HPO3 | 250 | 229.5 | 8.1 | 10.25 | 1.8 |
| JP-260*236*8.1 HPO3 | 260 | 236 | 8.1 | 12 | 1.8 |
| JP-270*246*8.1 HPO3 | 270 | 246 | 8.1 | 12 | 1.8 |
| JP-276*265.3*4.2 HPO3 | 276 | 265.3 | 4.2 | 6 | 1 |
| JP-280*256*8.1 HPO3 | 280 | 256 | 8.1 | 12 | 1.8 |
| JP-290*266*8.1 HPO3 | 290 | 266 | 8.1 | 12 | 1.8 |
| JP-290*279.3*4.2 HPO3 | 290 | 279.3 | 4.2 | 6 | 1 |
| JP-300*276*8.1 HPO3 | 300 | 276 | 8.1 | 12 | 1.8 |
| JP-320*296*8.1 HPO3 | 320 | 296 | 8.1 | 12 | 1.8 |
| JP-340*316*8.1 HPO3 | 340 | 316 | 8.1 | 12 | 1.8 |
| JP-360*336*8.1 HPO3 | 360 | 336 | 8.1 | 12 | 1.8 |
| JP-380*356*8.1 HPO3 | 380 | 356 | 8.1 | 12 | 1.8 |
| JP-400*376*8.1 HPO3 | 400 | 376 | 8.1 | 12 | 1.8 |
| JP-500*476*8.1 HPO3 | 500 | 476 | 8.1 | 12 | 1.8 |
| JP-540*516*8.1 HPO3 | 540 | 516 | 8.1 | 12 | 1.8 |
| JP-600*576*8.1 HPO3 | 600 | 576 | 8.1 | 12 | 1.8 |
| JP-650*626*8.1 HPO3 | 650 | 626 | 8.1 | 12 | 1.8 |
| JP-700*672.7*9.5 HPO3 | 700 | 672.7 | 9.5 | 14 | 2 |
| JP-800*772.7*9.5 HPO3 | 800 | 772.7 | 9.5 | 14 | 2 |
| JP-860*832.7*9.5 HPO3 | 860 | 832.7 | 9.5 | 14 | 2 |
| JP-900*872.7*9.5 HPO3 | 900 | 872.7 | 9.5 | 14 | 2 |
| JP-920*892.7*9.5 HPO3 | 920 | 892.7 | 9.5 | 14 | 2 |
| JP-1000*972.7*9.5 HPO3 | 1000 | 972.7 | 9.5 | 14 | 2 |
This technical diagram sets out the dimensions and geometric parameters needed to select and install the HPO3 piston seal correctly, a single-acting assembly consisting of a PTFE profile ring and an energising O-ring, both housed in the piston groove. It shows the dimensions linked to the size table, the outside diameter (ØD), the groove root diameter (Ød), the groove width (B), the lead-in chamfer length (C) and the groove root radius (R1), together with the radial clearance between piston and bore (S). The upper groove edges are radiused to r1 ≤ 0.2 mm and the piston is finished with a 20° lead-in chamfer, which must be rounded and free from burrs. The housing follows ISO 7425/1, and meeting these dimensions ensures correct O-ring pre-load, twist-free installation and stable sealing performance in diameters from 6 to 2000 mm.
This 3D illustration shows the structure of the HPO3 piston seal. As a two-piece assembly, it comprises a bronze-filled PTFE sealing ring at 60 Shore D, which runs against the cylinder bore, and an energising O-ring in NBR or FKM at 70 to 80 Shore A, seated beneath it at the groove root. The O-ring does not run against the bore, its role is to hold the PTFE ring steadily against the sliding surface and to compensate for wear and for temperature variation. This division of duties gives the profile its performance, the PTFE provides low friction, stick-slip free running, high resistance to wear and extrusion and good thermal conductivity, and the elastomer provides the closing force required even at low pressure. Being single-acting, the assembly is fitted with the lip facing the pressure side and withstands sliding speeds of up to 5 m/s.
