OTECO Pressure Relief Valves — 21050 / 30550
500964505-OtecoPRV.pdf
12 pages · PDF · 1.32 MB
Scanned product catalogue; page 2 lists 21050 / 30550.
Read original →Product reference / DONGLI
21050
Shear-pin pressure relief valve
From the complete assembly to the details that matter.
- Nameplate part no.
- 21050
- Nominal size (supplied)
- 2″
- Nameplate max. working pressure
- 5,000 psi
- Pump fitment
- To be confirmed
Recorded from the sample nameplate and supplied material. Working and relief pressures are distinct; connections, shear pins and operating conditions require technical confirmation. Pump fitment is to be confirmed; this page does not list verified compatible models.
Original designation: 压力释放阀
Pump fitment
To be confirmed. This page does not provide a verified pump-model list.
Sample and nameplate records
| Recorded item | Supplied value |
|---|---|
| Nominal size (supplied) | 2″ |
| Sample nameplate part number | 21050 |
| Nameplate maximum working pressure | 5,000 psi (≈ 34.5 MPa) |
| Nameplate maximum temperature | 250 °F (≈ 121 °C) |
| Photo-annotated unit weight (not independently weighed) | 12.5 kg |
| Pump fitment | 待确认 / To be confirmed（本页未提供已核验型号列表 / no verified model list on this page） |
Purpose and selection review
DONGLI 2-inch shear-pin pressure relief valve, nameplate part number 21050. Supplied sample photographs document the assembly, body, inlet and protective cover. Pump fitment is to be confirmed; this page does not provide a verified list of compatible pump models.
A shear-pin pressure relief device. Nameplate maximum working pressure is distinct from nominal relief pressure for an individual pin configuration. Confirm connections, thread standard, fluid, pin specification and required relief pressure for the actual system.
Photographic record / 21050
Details, with the originals in view.
Original sample photographs, with no illustrative render substituted. Open a photograph in a new tab to inspect the detail.
More photographs & nameplate (3)
Reference library / original PDF
Original references. Check against the actual valve.
These two OTECO English-language publications were supplied as references for model and component identification. Their materials, certifications, pressure configurations and part conditions do not automatically apply to the DONGLI samples and do not establish brand authorization or interchange.
Original PDF · new tab ↗
OTECO EB-003 Rev. C — Pressure Relief Valves
OTECO-EB003RevC.pdf
24 pages · PDF · 1.53 MB
Revised 15 June 2007; 30550 on page 12, 21050 on page 17.
Read original →EB-003 pages 3–4 describe the conditions for nominal relief pressures and specified shear pins. Confirm the actual configuration, duty and controlled technical documents before selection.
Browse all original manuals →Prepare a review checklist
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Include the nameplate, original part number, manual page and the quantity you need. Check the original request before sending.