SKF DPV 222 K0M hydraulic double-acting piston seal — SKF Industrial Seals hydraulic piston profile for medium- to heavy-duty hydraulic-cylinder service. DPV DESIGNATION: per the SKF Hydraulic Seals catalogue publication 12393 (Section 2.2, page 60), DPV is defined as a DOUBLE-ACTING PISTON SEAL profile. (The often-quoted 'Double-acting Piston Vulkollan' three-letter folk expansion is UNVERIFIED in the SKF catalogue — SKF does not spell the letters out. Vulkollan is a Covestro trademark, not SKF's slide-ring material.) SIZE CODE: '222' is a SIZE code, NOT a compound code. The DPV profile is available in inch sizes matching AS568 O-ring dash-number housings. DPV 222 therefore fits an AS568 -222 O-ring dash-number piston groove — SKF's catalogue text: 'DPV profiles are available in inch sizes where O-ring dash-number housings are used'. Exact D / d / L dimensions per SKF Hydraulic Seals catalogue 12393 page 61 (dash-number table row -222); confirm the specific dimensions against the current SKF product page for the exact installation. K0M MATERIAL-COMBINATION SUFFIX: per the SKF material tables, K0M denotes the pairing of: Slide ring = X-ECOPUR PS (SKF's premium thermoplastic polyurethane / TPU, 98 Shore A / 60 Shore D, green colour, developed for extrusion resistance at high pressure); Energizer = A-8501 (NBR / nitrile rubber, 70 Shore A, black). Every DPV inch-size in the catalogue table carries the K0M suffix — it is the standard material combination for the DPV profile. K0M is NOT a colour code, NOT a reinforcement code, and NOT a Vulkollan / non-Vulkollan distinction. The literal three-letter K0M expansion is not documented in the SKF material tables; treat as unverified. DUTY ENVELOPE (verified from SKF catalogue 12393): pressure up to 400 bar (5,800 psi), speed up to 1 m/s (3.2 ft/s), recommended continuous temperature -40 C to +110 C, with occasional excursions to -60 C (-75 F) or +130 C (+265 F). RANGE: DPV is inch-sized ONLY, one material combination (K0M). Dash-number sizes visible in the SKF catalogue table span from -210 through -433+ in the -200, -300 and -400 series. The metric-sized equivalent is the SKF MPV profile (Metric double-acting Piston seal, same double-acting design, metric-sized instead of AS568-dash-numbered). Buyers with a metric groove specify MPV; buyers with an AS568 groove specify DPV. RELATED SKF HYDRAULIC SEAL FAMILIES (from SKF Hydraulic Seals catalogue 12393 table of contents): Piston seals (double-acting): MPV (metric), DPV (inch — this product family), LPV, CPV, GH, APR, LCP, LTP, CUT, SCP, MD-L; Rod seals: DZ (verified in the current catalogue extract); Wiper seals: DTW, DX; Guide and wear rings: WAT (metric + inch), RGR, PGR. Legacy SKF hydraulic seal families RSJ and PDR are NOT present in the current 12393 revision — likely obsolete or non-catalogue; confirm with SKF applications engineering if the vessel or plant uses these older designations. IMPORTANT CLARIFICATION: SKF's 'CR' (Chicago Rawhide) line is SHAFT SEALS and OIL SEALS, NOT hydraulic profile seals. Do not conflate SKF CR with SKF DPV / MPV. APPLICATIONS (direct SKF catalogue text): 'Medium to heavy duty applications such as earthmoving equipment'. Typical fitment: hydraulic press cylinders, mobile hydraulics (excavator, loader, crane cylinders), deck-machinery hydraulic actuators, industrial hydraulic actuators, injection-moulding machine hydraulic cylinders, and general heavy-hydraulics service where the 400-bar / 1-m/s duty envelope suits the application. STANDARD SIZING: SKF-proprietary size code layered on AS568 / ISO 3601 O-ring dash-number housing dimensions (inch). The dash-number sizing lets a designer specify a DPV by referencing an off-the-shelf standard groove size rather than by piston-OD alone. COMPETITOR CROSS-REFERENCES: while equivalent double-acting piston seals exist in other manufacturers' ranges (Freudenberg Merkel PT, Trelleborg Sealing Solutions Turcon Glyd Ring T, Parker Polypak, Hallite 621 / 605), a valid cross-reference for a specific -222 dash-number DPV K0M size must be pulled from each competitor's own datasheet (piston OD, groove dimensions, materials) — not asserted from memory. For a cross-brand quote, cBallast will request the exact piston OD, groove ID, groove width, cylinder bore, operating pressure and fluid before recommending an alternative. cBallast supplies the full SKF DPV range plus MPV metric equivalents, WAT guide-and-wear rings, DZ rod seals, DTW / DX wipers, and cross-brand equivalents ex-EU stock. Request a quote by SKF designation (DPV-222-K0M vs metric MPV alternative), the groove dimensions (piston OD, groove ID, groove width), operating pressure and speed, hydraulic fluid (mineral oil vs HFA/HFB fire-resistant vs HFC water-glycol vs biodegradable vegetable-based), and continuous operating temperature. Datasheet reference: SKF Hydraulic Seals catalogue publication 12393 (downloadable at cdn.skfmediahub.skf.com/.../HydraulicSeals_SKF_12393_3_EN); SKF product page URL pattern skf.com/us/products/industrial-seals/hydraulic-seals/piston-seals/productid-DPV-222-K0M.