The piston seal type Aston Seals YP, mainly suitable for low pressure conditions or pneumatic eld, is composed of:
YP 218-38 YP 219-40 YP 220-42 YP 221-43 YP 222-45 YP 325-50 YP 326-52 YP 327-55 YP 328-58 YP 329-61 YP 330-65 YP 331-68 YP 332-70 YP 333-75 YP 334-77 YP 335-80 YP 336-85 YP 337-86 YP 338-90 YP 339-92 YP 340-95 YP 341-100 YP 004-6 YP 006-7 YP 008-8 YP 009-9 YP 010-10 YP 011-11 YP 012-13 YP 110-15 YP 111-16 YP 112-18 YP 113-20 YP 114-21 YP 115-22 YP 116-25 YP 210-26 YP 211-28 YP 212-29 YP 213-30 YP 214-32 YP 215-34 YP 216-35 YP 217-37 YP 342-102 YP 343-105 YP 344-108 YP 345-111 YP 346-115 YP 347-118 YP 348-121 YP 349-125 YP 425-127 YP 426-130 YP 427-135 YP 428-137 YP 429-140 YP 430-143 YP 431-146 YP 432-150 YP 433-153 YP 434-156 YP 435-160 YP 436-162 YP 437-165 YP 438-172 YP 682-275 YP 450-280 YP 684-286 YP 451-295 YP 686-300 YP 452-305 YP 688-315 YP 453-320 YP 454-330 YP 455-345 YP 456-355 YP 457-370 YP 458-380 YP 459-395 YP 460-410 YP 439-178 YP 440-184 YP 441-191 YP 442-197 YP 443-203 YP 444-210 YP 445-216 YP 674-222 YP 446-230 YP 676-235 YP 447-242 YP 678-250 YP 448-255 YP 680-260 YP 449-270