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RM Ring (V-Ring Type RM)

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RM Ring Seal & RM Ring Size Chart

Specifically formulated with special peroxide-cured FKM rubber, the RM ring seal withstands continuous exposure to 250°C and peak temperatures of up to 300°C. Its spiral reinforcement grooves maintain seal integrity during thermal expansion and are compatible with shaft diameters ranging from 300 to 2000 mm. The RM ring is widely adopted in industrial furnaces, turbocharger bearings, and pyrolysis equipment. Our RM ring seal provides exceptional resistance to thermal cycling and hot media leakage.

Savvy is a China manufacturer and supplier specializing in precision-molded NBR/FKM V-Ring seals with standardized profiles (VA/VAX/VS/VE/VL/VLX/RM/RME), manufactured to ISO 3601-3 tolerances. Our rigorous quality control and space-optimized designs ensure a service life of over 12,000 hours in demanding conditions ranging from -40°C to 200°C.

RM Ring V-Ring Type RM
RM Ring Seal Installation
RM Ring Seal Drawing

RM Ring (V-Ring Type RM) Size Chart

Dimensions are in millimeters (mm)      ID = Inside Diameter     OD = Outside Diameter     H = Height

RM Type ID OD Height Shaft Diameter Size Wall Maximum Minimum Fitted Width
Ref. d d + 2c H (B) d1 A W (c) d2 d3 B1
RM-300 294 320 100 300-305 67.5 13 d1+24 d1+115 85±12
RM-305 299 325 100 305-310 67.5 13 d1+24 d1+115 85±12
RM-310 304 330 100 310-315 67.5 13 d1+24 d1+115 85±12
RM-315 309 335 100 315-320 67.5 13 d1+24 d1+115 85±12
RM-320 314 340 100 320-325 67.5 13 d1+24 d1+115 85±12
RM-325 319 345 100 325-330 67.5 13 d1+24 d1+115 85±12
RM-330 323 349 100 330-335 67.5 13 d1+24 d1+115 85±12
RM-335 328 354 100 335-340 67.5 13 d1+24 d1+115 85±12
RM-345 338 364 100 345-350 67.5 13 d1+24 d1+115 85±12
RM-350 343 369 100 350-355 67.5 13 d1+24 d1+115 85±12
RM-355 347 373 100 355-360 67.5 13 d1+24 d1+115 85±12
RM-360 352 378 100 360-365 67.5 13 d1+24 d1+115 85±12
RM-365 357 383 100 365-370 67.5 13 d1+24 d1+115 85±12
RM-370 362 388 100 370-375 67.5 13 d1+24 d1+115 85±12
RM-375 367 393 100 375-380 67.5 13 d1+24 d1+115 85±12
RM-380 371 397 100 380-385 67.5 13 d1+24 d1+115 85±12
RM-385 376 402 100 385-390 67.5 13 d1+24 d1+115 85±12
RM-390 381 407 100 390-395 67.5 13 d1+24 d1+115 85±12
RM-395 386 412 100 395-400 67.5 13 d1+24 d1+115 85±12
RM-400 391 417 100 400-405 67.5 13 d1+24 d1+115 85±12
RM-405 396 422 100 405-410 67.5 13 d1+24 d1+115 85±12
RM-410 401 427 100 410-415 67.5 13 d1+24 d1+115 85±12
RM-415 405 431 100 415-420 67.5 13 d1+24 d1+115 85±12
RM-420 410 436 100 420-425 67.5 13 d1+24 d1+115 85±12
RM-425 415 441 100 425-430 67.5 13 d1+24 d1+115 85±12
RM-430 420 446 100 430-435 67.5 13 d1+24 d1+115 85±12
RM-435 425 451 100 435-440 67.5 13 d1+24 d1+115 85±12
RM-440 429 455 100 440-445 67.5 13 d1+24 d1+115 85±12
RM-445 434 460 100 445-450 67.5 13 d1+24 d1+115 85±12
RM-450 439 465 100 450-455 67.5 13 d1+24 d1+115 85±12
RM-455 444 470 100 455-460 67.5 13 d1+24 d1+115 85±12
RM-460 448 474 100 460-465 67.5 13 d1+24 d1+115 85±12
RM-465 453 479 100 465-470 67.5 13 d1+24 d1+115 85±12
RM-470 458 484 100 470-475 67.5 13 d1+24 d1+115 85±12
RM-475 463 489 100 475-480 67.5 13 d1+24 d1+115 85±12
RM-480 468 494 100 480-485 67.5 13 d1+24 d1+115 85±12
RM-485 473 499 100 485-490 67.5 13 d1+24 d1+115 85±12
RM-490 478 504 100 490-495 67.5 13 d1+24 d1+115 85±12
RM-495 483 509 100 495-500 67.5 13 d1+24 d1+115 85±12
RM-500 488 514 100 500-505 67.5 13 d1+24 d1+115 85±12
RM-505 493 519 100 505-510 67.5 13 d1+24 d1+115 85±12
RM-510 497 523 100 510-515 67.5 13 d1+24 d1+115 85±12
RM-515 502 528 100 515-520 67.5 13 d1+24 d1+115 85±12
RM-520 507 533 100 520-525 67.5 13 d1+24 d1+115 85±12
RM-525 512 538 100 525-530 67.5 13 d1+24 d1+115 85±12
RM-530 517 543 100 530-535 67.5 13 d1+24 d1+115 85±12
RM-535 521 547 100 535-540 67.5 13 d1+24 d1+115 85±12
RM-540 526 552 100 540-545 67.5 13 d1+24 d1+115 85±12
RM-545 531 557 100 545-550 67.5 13 d1+24 d1+115 85±12
RM-550 536 562 100 550-555 67.5 13 d1+24 d1+115 85±12
RM-555 541 567 100 555-560 67.5 13 d1+24 d1+115 85±12
RM-560 546 572 100 560-565 67.5 13 d1+24 d1+115 85±12
RM-565 550 576 100 565-570 67.5 13 d1+24 d1+115 85±12
RM-570 555 581 100 570-575 67.5 13 d1+24 d1+115 85±12
RM-575 560 586 100 575-580 67.5 13 d1+24 d1+115 85±12
RM-580 565 591 100 580-585 67.5 13 d1+24 d1+115 85±12
RM-585 570 596 100 585-590 67.5 13 d1+24 d1+115 85±12
RM-590 575 601 100 590-600 67.5 13 d1+24 d1+115 85±12
RM-600 582 608 100 600-610 67.5 13 d1+24 d1+115 85±12
RM-610 592 618 100 610-620 67.5 13 d1+24 d1+115 85±12
RM-620 602 628 100 620-630 67.5 13 d1+24 d1+115 85±12
RM-630 612 638 100 630-640 67.5 13 d1+24 d1+115 85±12
RM-640 621 647 100 640-650 67.5 13 d1+24 d1+115 85±12
RM-650 631 657 100 650-660 67.5 13 d1+24 d1+115 85±12
RM-660 640 666 100 660-670 67.5 13 d1+24 d1+115 85±12
RM-670 650 676 100 670-680 67.5 13 d1+24 d1+115 85±12
RM-680 660 686 100 680-690 67.5 13 d1+24 d1+115 85±12
RM-690 670 696 100 690-700 67.5 13 d1+24 d1+115 85±12
RM-700 680 706 100 700-710 67.5 13 d1+24 d1+115 85±12
RM-710 689 715 100 710-720 67.5 13 d1+24 d1+115 85±12
RM-720 699 725 100 720-730 67.5 13 d1+24 d1+115 85±12
RM-730 709 735 100 730-740 67.5 13 d1+24 d1+115 85±12
RM-740 718 744 100 740-750 67.5 13 d1+24 d1+115 85±12
RM-750 728 754 100 750-758 67.5 13 d1+24 d1+115 85±12
RM-760 735 761 100 758-766 67.5 13 d1+24 d1+115 85±12
RM-770 743 769 100 766-774 67.5 13 d1+24 d1+115 85±12
RM-780 751 777 100 774-783 67.5 13 d1+24 d1+115 85±12
RM-790 759 785 100 783-792 67.5 13 d1+24 d1+115 85±12
RM-800 768 794 100 792-801 67.5 13 d1+24 d1+115 85±12
RM-810 777 803 100 801-810 67.5 13 d1+24 d1+115 85±12
RM-820 786 812 100 810-821 67.5 13 d1+24 d1+115 85±12
RM-830 796 822 100 821-831 67.5 13 d1+24 d1+115 85±12
RM-840 805 831 100 831-841 67.5 13 d1+24 d1+115 85±12
RM-850 814 840 100 841-851 67.5 13 d1+24 d1+115 85±12
RM-860 824 850 100 851-861 67.5 13 d1+24 d1+115 85±12
RM-870 833 859 100 861-871 67.5 13 d1+24 d1+115 85±12
RM-880 843 869 100 871-882 67.5 13 d1+24 d1+115 85±12
RM-890 853 879 100 882-892 67.5 13 d1+24 d1+115 85±12
RM-900 871 897 100 892-912 67.5 13 d1+24 d1+115 85±12
RM-920 880 906 100 912-922 67.5 13 d1+24 d1+115 85±12
RM-930 890 916 100 922-933 67.5 13 d1+24 d1+115 85±12
RM-940 900 926 100 933-944 67.5 13 d1+24 d1+115 85±12
RM-950 911 937 100 944-955 67.5 13 d1+24 d1+115 85±12
RM-960 921 947 100 955-966 67.5 13 d1+24 d1+115 85±12
RM-970 932 958 100 966-977 67.5 13 d1+24 d1+115 85±12
RM-980 942 968 100 977-988 67.5 13 d1+24 d1+115 85±12
RM-990 953 979 100 988-999 67.5 13 d1+24 d1+115 85±12
RM-1000 963 989 100 999-1010 67.5 13 d1+24 d1+115 85±12
RM-1020 973 999 100 1010-1025 67.5 13 d1+24 d1+115 85±12
RM-1040 990 1016 100 1025-1045 67.5 13 d1+24 d1+115 85±12
RM-1060 1008 1034 100 1045-1065 67.5 13 d1+24 d1+115 85±12
RM-1080 1027 1053 100 1065-1085 67.5 13 d1+24 d1+115 85±12
RM-1100 1045 1071 100 1085-1105 67.5 13 d1+24 d1+115 85±12
RM-1120 1065 1091 100 1105-1125 67.5 13 d1+24 d1+115 85±12
RM-1140 1084 1110 100 1125-1145 67.5 13 d1+24 d1+115 85±12
RM-1160 1103 1129 100 1145-1165 67.5 13 d1+24 d1+115 85±12
RM-1180 1121 1147 100 1165-1185 67.5 13 d1+24 d1+115 85±12
RM-1200 1139 1165 100 1185-1205 67.5 13 d1+24 d1+115 85±12
RM-1220 1157 1183 100 1205-1225 67.5 13 d1+24 d1+115 85±12
RM-1240 1176 1202 100 1225-1245 67.5 13 d1+24 d1+115 85±12
RM-1260 1195 1221 100 1245-1270 67.5 13 d1+24 d1+115 85±12
RM-1280 1218 1244 100 1270-1295 67.5 13 d1+24 d1+115 85±12
RM-1300 1240 1266 100 1295-1315 67.5 13 d1+24 d1+115 85±12
RM-1325 1259 1285 100 1315-1340 67.5 13 d1+24 d1+115 85±12
RM-1350 1281 1307 100 1340-1365 67.5 13 d1+24 d1+115 85±12
RM-1375 1305 1331 100 1365-1390 67.5 13 d1+24 d1+115 85±12
RM-1400 1328 1354 100 1390-1415 67.5 13 d1+24 d1+115 85±12
RM-1425 1350 1376 100 1415-1440 67.5 13 d1+24 d1+115 85±12
RM-1450 1374 1400 100 1440-1465 67.5 13 d1+24 d1+115 85±12
RM-1475 1397 1423 100 1465-1490 67.5 13 d1+24 d1+115 85±12
RM-1500 1419 1445 100 1490-1515 67.5 13 d1+24 d1+115 85±12
RM-1525 1443 1469 100 1515-1540 67.5 13 d1+24 d1+115 85±12
RM-1550 1467 1493 100 1540-1570 67.5 13 d1+24 d1+115 85±12
RM-1575 1495 1521 100 1570-1600 67.5 13 d1+24 d1+115 85±12
RM-1600 1524 1550 100 1600-1640 67.5 13 d1+24 d1+115 85±12
RM-1650 1559 1585 100 1640-1680 67.5 13 d1+24 d1+115 85±12
RM-1700 1596 1622 100 1680-1720 67.5 13 d1+24 d1+115 85±12
RM-1750 1632 1658 100 1720-1765 67.5 13 d1+24 d1+115 85±12
RM-1800 1671 1697 100 1765-1810 67.5 13 d1+24 d1+115 85±12
RM-1850 1714 1740 100 1810-1855 67.5 13 d1+24 d1+115 85±12
RM-1900 1753 1779 100 1855-1905 67.5 13 d1+24 d1+115 85±12
RM-1950 1794 1820 100 1905-1955 67.5 13 d1+24 d1+115 85±12
RM-2000 1844 1870 100 1955-2010 67.5 13 d1+24 d1+115 85±12
Download PDF Version

Download the Printable PDF RM Ring Size Chart by clicking the above button, and if you need our Excel version, please send an email to: [email protected].

RM Ring Materials

The most commonly used materials for RM Rings are nitrile NBR and FKM/Viton. And the hardness (durometer) of NBR and FKM rubber is generally 60 Shore A. HNBR, EPDM, and PTFE are rarely used in some special scenarios. 

1. ‌NBR – Excellent oil resistance, good elasticity, suitable for mineral oil, grease and other media, the working temperature is generally -40℃～100℃‌. Widely used in the seals of automobiles, bearings, pumps and other equipment, and is a common material for V-type water seals (such as VA type, VL type).

2. ‌FKM/Viton – High temperature resistance (up to 200℃), strong chemical corrosion resistance, suitable for harsh media such as synthetic oil, acid, alkali, etc. ‌Used for water seals in high temperature or chemical corrosion environments (such as VA type, VL type).

3. ‌HNBR – Hydrogenated and modified based on NBR, the temperature resistance is significantly improved (-40℃～150℃), while retaining excellent oil resistance, and stronger oxidation resistance and chemical corrosion resistance‌. Suitable for sealing scenarios with higher temperatures or chemical environments, such as high-temperature oil pressure equipment, chemical pumps, etc.

4. ‌‌EPDM‌ – ‌Outstanding water and steam resistance, temperature resistance range -40℃～150℃, suitable for non-oily media such as water and air. ‌Used for sealing in water treatment equipment or humid environments.

Depending on the different material, RM ring can be used in the following working conditions:

Speed: ≤19m/s; Pressure: ≤40MPa; Temperature: -40℃～+200℃; Medium: mineral oil, air, water, emulsion, grease, etc.

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