SLA-HP250 Medical-Bed Hydraulic Catalog
Self-contained hydraulic · Medical equipment
SLA-HP250 Hydraulic Actuator
Rated 300 kg, self-lock up to 10 kN (1000 kg), 80–400 mm stroke. Pump, cylinder, valves and reservoir in one sealed unit — manual/foot operation, no external power. Outline drawings for 180–300 mm are on this page.
Key specifications
- Maximum push force
- Up to 10 kN (self-lock 1000 kg)
- Stroke
- 130 / 140 / 150 / 180 / 200 / 250 / 300 / 400 mm (catalog + outline drawings)
- Valve configuration
- Pressure-relief valve + flow-control valve for descent
- Actuation mode
- Manual / foot pump operation (no external power)
- Cylinder type
- Single-acting cylinder
Typical applications
Built for patient handling and care-equipment platforms. Final suitability should still be confirmed against your load case, mounting geometry and applicable regulatory requirements.
- Hospital beds Medical / care equipment
- Home care beds Medical / care equipment
- Beauty beds Medical / care equipment
- Patient lifting devices Medical / care equipment
- Examination couches Medical / care equipment
- Physiotherapy tables Medical / care equipment
- Medical chairs Medical / care equipment
- Custom patient-handling equipment Medical / care equipment
Benefits
- Self-contained hydraulic actuator: pump, cylinder, valves and reservoir in one housing
- Manual / foot operation — no external power required for core lift and lower
- Rated load 300 kg; self-lock 1000 kg (≈ 10 kN) from the factory catalog
- Catalog stroke examples 130 / 140 / 150 / 200 / 250 / 300 / 400 mm; family range 80–400 mm, customizable
- Flow-control valve for descent and installed pressure-relief valve
- A-type / B-type installation on the 180 mm outline (pump 30°–36°, release 6°–10°)
- Trunnion mount; 25 mm honed tube × 22 mm rod on the 25×22 family
- Working pressure 16–30 MPa; temperature −50°C to +100°C
Technical specifications
| Maximum push force | Up to 10 kN (self-lock 1000 kg) |
|---|---|
| Stroke | 130 / 140 / 150 / 180 / 200 / 250 / 300 / 400 mm (catalog + outline drawings) |
| Stroke options | 130 / 140 / 150 / 180 / 200 / 250 / 300 / 400 mm (catalog + outline drawings) |
| Cylinder type | Single-acting cylinder |
| Valve configuration | Pressure-relief valve + flow-control valve for descent |
| Actuation mode | Manual / foot pump operation (no external power) |
| Rated load | 300 kg |
| Self-lock load | 1000 kg (≈ 10 kN) |
| Mounting pin | Ø18 pin, Ø38 / Ø42 trunnion |
| Operating pressure | 16-30 MPa |
| Operating temperature | −50°C to +100°C |
| Service life | 50,000 cycles (200 mm and 300 mm drawings) |
Configuration options
- Holes on the pedal shaft
- Mounting brackets
- Suction tube
- Custom actuator colors
- TÜV certification available on request
- Custom stroke within the published family range
How the SLA-HP250 works
SLA-HP250 is a self-contained hydraulic actuator: pump, cylinder, valves and reservoir in one housing. Caregivers raise the load by pumping the pedal or hand lever. A release motion opens the descent path. A flow-control valve is intended to keep lowering speed consistent, and a pressure-relief valve is installed for overload protection. Core lift and lower do not need external electric power.
Load ratings from the factory catalog
Changxing’s medical-bed hydraulic catalog lists these working loads. Use them as the selection starting point; confirm the load case on the drawing issued for your stroke.
| Rating | Value | Source |
|---|---|---|
| Can bear | 250 kg | Factory catalog |
| Rated load | 300 kg | Factory catalog; 200 mm and 300 mm drawings |
| Maximum load (catalog) | 600 kg | Factory catalog |
| Self-lock load | 1000 kg (≈ 10 kN) | Factory catalog |
| Maximum load (200 / 300 mm drawings) | 1200 kg | Stroke 200 and 300 outline drawings |
The 200 mm and 300 mm drawings list a higher maximum than the catalog. Treat 300 kg as the rated working load and confirm the maximum for your stroke during application review. This page does not claim drop-in interchange with any third-party model.
Stroke options
The catalog lists 130, 140, 150, 200, 250, 300 and 400 mm, and stroke can be customized. Published family range on this page remains 80–400 mm. Outline drawings on this page document 180, 200, 250 and 300 mm envelopes. The studio unit is marked 25×22-130A (25 mm bore × 22 mm rod, 130 mm stroke sample).
Pedal motion (180 mm outline)
The SLA-HP250 180 mm outline drawing shows A-type and B-type installation and these angles:
- Pump stroke: 30°–36°
- Free stroke: 2°–5°
- Release stroke: 6°–10°
Reference envelope on that drawing: body width 80 mm; retracted length 240 ± 2 mm (205 ± 2 mm to the inner shoulder); trunnion Ø18 / Ø38; rod-end eye on the views. Confirm the revision issued for your build — other strokes use different overall lengths.
200 / 250 / 300 mm mounting (tailed housing)
The 200, 250 and 300 mm tailed-housing drawings share a 160 mm overall trunnion span (110 mm between inner faces, 86 mm housing, Ø18 pin / Ø38 / Ø42). Housing Ø50 / Ø60. Rod Ø22 / Ø19 on the 200 and 250 views; rod-end eye about Ø12.1–Ø12.3.
| Stroke drawing | Key envelope | Performance table on the drawing |
|---|---|---|
| 200 mm | Retracted stack 322 ± 2 mm; stroke 200 −0/+0 | 6 mm rise per pump; descent < 15 mm/s; rated 300 kg; max 1200 kg; 50,000 cycles; NOK seals |
| 250 mm | Main length 374 mm; housing 108 mm | Stroke marked 250; same 160 mm trunnion family |
| 300 mm | Retracted 422 ± 2 mm; stroke 300 −0/−4 | Same performance table as 200 mm; pump rotate 33° ± 1° to raise, ≤ 15° to lower |
Installation notes from the drawings
- 200 mm and 300 mm drawings: keep the marked face up; the unit may be used from horizontal to vertical.
- 300 mm drawing: rotation 33° ± 1° in the raise direction; do not exceed 15° in the lower direction.
- Push-only architecture: the load should bear on the rod. Side load and forced misalignment must be designed out of the frame.
- A separate 25×22-200 outline (190 mm overall width) exists for the 25×22 ram envelope — do not mix it with the 160 mm tailed-housing drawing.
Construction (SLA-HP250 catalog table)
- Materials: carbon steel / alloy steel (27SiMn, 45#, 20#, and equivalents)
- Honed tube: 25 mm, heat-treated and honed
- Piston rod: 22 mm, nickel plate, hard chrome or ceramic
- Mounting: trunnion
- Working medium: hydraulic oil
- Working pressure: 16-30 MPa
- Temperature range: −50°C to +100°C
- Coating: sandblast, primer, mid-coat and finish; color on request
Dimensions & installation drawing
Envelope numbers below are from the factory outline drawings for 180, 200, 250 and 300 mm. Confirm the revision issued for your stroke before CAD freeze.
Information required for engineering review
Key ratings are published above. Share the details below so we can confirm the correct configuration for your equipment design.
- Application and duty profile
- Required load and unit
- Required stroke within 80–400 mm (catalog examples 130 / 140 / 150 / 200 / 250 / 300 / 400 mm)
- Retracted length / mounting envelope
- Mounting, pedal and release requirements (A-type or B-type if using the 180 mm outline)
- Desired descent behavior
- Which outline drawing to quote against (180 / 200 / 250 / 300 mm)
- Quantity / annual volume
- Optional extras (brackets, suction tube, color, TÜV)
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FAQ
What is the SLA-HP250?
The SLA-HP250 is a self-contained hydraulic actuator that combines pump, cylinder, valves and reservoir in one compact unit. It is intended for medical beds, beauty beds, patient-lifting devices and related care equipment, with manual/foot operation and no external power required.
What load and stroke options are available?
The factory catalog lists a 300 kg rated load, 600 kg maximum load and 1000 kg self-lock (≈ 10 kN). Published stroke range is 80–400 mm, with catalog examples at 130, 140, 150, 200, 250, 300 and 400 mm. Outline drawings on this page document 180, 200, 250 and 300 mm. Share your required load, stroke and mounting envelope for application confirmation.
How does descent control work?
The unit includes a flow-control valve for smooth descent regardless of patient weight, plus an installed pressure-relief valve for overload protection. The 180 mm outline shows a 6°–10° release stroke; the 200/300 mm drawings list descent below 15 mm/s and about 6 mm rise per pump stroke.
Are drawings and CAD files available?
2D outline drawings for 180, 200, 250 and 300 mm are downloadable on this page, together with the factory catalog. STEP / CAD files are confirmed per configuration after application review. Use the drawing that matches your stroke; the 25×22-200 envelope is not identical to the 160 mm tailed-housing drawings.
Is it a drop-in replacement?
This page does not claim drop-in compatibility with any third-party model. Share existing installation drawings and operating conditions for engineering review.
What certifications cover this product?
TÜV certification can be discussed as an option for specific builds. Equipment OEMs remain responsible for system-level regulatory assessment of the finished medical device.
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