HL-SEAL-001 · REV C · 27 August 2026
Leg gland
Six elements, environment to oil, at every stage interface. Diameters are locked. Mix families only if an application engineer signs the stack.
Skimmer 3-stage legs — Ø80 / Ø140 / Ø180 locked
Envelope
| Parameter | Value |
|---|---|
| Pressure | 210–250 bar nom. 300 bar proof |
| Spikes | 1.4× on one-leg plant |
| Ambient | −40 °C to +50 °C |
| Fluid | ISO VG 46. VG 32 arctic option |
| Finish | Ra 0.2–0.4 µm. No spiral grind |
| Smax @ 25 MPa | 0.25 mm radial |
Stack — environment left, oil right
1 · ISO 6195 Type C
Ice scraper
Shear packed ice and grit before anything elastomeric sees it.
Zurcon DA22 / DA24 Venting. Hallite 831 metric. WKE metal-cased.
2 · ISO 6195 Type A or C
Wiper
Fine dust and melt water the scraper missed.
Zurcon Excluder ESA or Parker PDW.
3 · ISO 7425-2 short
Buffer
Dump spikes. Stop inter-stage trap from blowing the wiper out.
Parker BU Ultrathan. Hallite 653.
4 · ISO 7425-2 / TSS RSK
Primary
Takes 250 bar. Must back-pump the oil film inbound.
Turcon Stepseal 2K + O-ring energizer. T46 jacket, T suffix O-ring.
5 · ISO 5597
Secondary
Dry rod. Survives a nicked primary. Leak-sense volume lives here.
Zurcon Rimseal / RU9. Hallite 605. Parker Type B PolyPak.
6 · ISO 10766
Wear rings
Take side load. Keep lips concentric. Never metal-on-metal.
Orkot / Luytex Slydring C380. Two rings on Ø140 / Ø180.
Skip the ice scraper on the Ø80 actuator — it lives in oil. Keep a light Type C wiper. Prefer DA24 Venting on Ø180. Leave ≥ 7.5 mm metal between scraper and Stepseal on Ø140 / Ø180. Leak-sense M10×1 taps the pocket between primary and secondary.
Locked running diameters
| Member | Running Ø | Seals on it |
|---|---|---|
| Inner actuator rod | Ø80 f8 | Oil gland. No ice scraper. |
| Inner stage tube OD | Ø140 f8 | Intermediate. Full ice stack. |
| Intermediate tube OD | Ø180 f8 | Outer gland. DA24 here. |
| Outer stage tube OD | Ø220 h9 | Structure. No dynamic seal. |
Gland table — cut these
Housings are ISO. A Parker or Hallite equal must drop into the same groove, not a near-groove. Do not mix an RSK3 part into an RSKD ISO-only pocket without matching D1.
P part · D1 groove · S radial · L length · t thickness · O energizer
| Groove | Std | Ø80 | Ø140 | Ø180 |
|---|---|---|---|---|
| Rod / tube | ISO 3320 | 80 f8 | 140 f8 | 180 f8 |
| 1 Scraper | ISO 6195-C | D190 H11 S5.0 L6.3 +0.2/0 | D1155 H11 S7.5 L9.5 +0.3/0 | D1195 H11 S7.5 L9.5 +0.3/0 |
| 3 Buffer | ISO 7425-2 | D195.5 H9 S7.75 L4.2 +0.2/0 | D1155.5 H9 S7.75 L4.2 +0.2/0 | D1195.5 H9 S7.75 L4.2 +0.2/0 |
| 4 Primary RSK3 | TSS RSK3 | PRSK300800-T46T D195.1 H9 L6.3 O85.09 × 5.33 | PRSK301400-T46T D1155.1 H9 L6.3 O145.42 × 5.33 | PRSK301800-T46T D1195.1 H9 L6.3 O183.52 × 5.33 |
| 5 Secondary | ISO 5597 | D1100 H11 S10.0 L12.5 +0.25/0 | D1165 H11 S12.5 L16.0 +0.25/0 | D1210 H11 S15.0 L20.0 +0.25/0 |
| 6 Wear ring | ISO 10766 | D185 L9.7 t2.5 | D1148 L15.0 t4.0 | D1185 L15.0 t2.5 / 4.0 side-load |
| Lead-in | ISO 7425-2 | C 4.0 · 15–20° | C 5.0 · 15–20° | C 5.0 · 15–20° |
| RSK4 heavy | TSS RSK4 | PRSK400800-T46T D1100.5 L8.1 O88 × 7.00 | PRSK401400-T46T D1160.5 L8.1 | PRSK401800-T46T D1200.5 L8.1 O189.87 × 7.00 |
Compounds
| Element | Default | Do not |
|---|---|---|
| Scraper / wiper | Zurcon Z20 PU or Hallite 371 | Not standard NBR in ice |
| Primary jacket | Turcon T46. T08 if the gap grows | Not virgin PTFE |
| Energizer | Low-temp NBR (T) or HNBR | FKM only if fluid demands |
| Secondary | Zurcon Z20 / Hallite Hythane 181 | Keep spare bag out of UV |
| Wear ring | Orkot / fabric-phenolic | Not bronze on chrome in ice |
Still open — not diameters
- Bolt-on gland cartridge vs integral grooves is HL-SEAL-002.
- Confirm T vs HNBR energizer against VG 46 at −40 °C.
- Prefer DA24 Venting on Ø180. Ø140 may stay DA22 if the annulus is orificed.
- Hallite 820 is Type D / NA housing. Do not drop it in ISO 6195-C. Use 831 metric.
- First article: one Ø140 interface, freezer + grit, 200 strokes, leak-sense dry.