Data coverage & sources
The stored record for Welch CRVpro 4: specifications, configurations, documents, sources, and gaps.
One model, connected records
Welch → CRVpro 4 → CRVpro 4
Manufacturer model: CRVpro 4 · OEM article / order number: Not collected · Equipment type: vacuum pump
Technology: Oil-Lubricated Rotary Vane
Related applications: Central Vacuum, Degassing, Drying, Leak Testing, Medical Suction, Packaging, Vacuum Forming
Related industries: Automotive, Food + Beverage, Medical, Metalworking, Packaging, Plastics
These are technology associations. Check the operating point and process requirements to establish suitability for this model.
Compare coverage across this familySpecifications and evidence
15 stored observations · 4 pass the source policy at 60 Hz. Individual ratings do not establish flow at a requested pressure.
The collection checklist follows the equipment type. Additional attributes are retained. “Not collected” means the database has no observation for that field.
Pumping speed · Other conditions · 1 observations / 1 sources
| As published | Normalized | Configuration / scope | Source / status |
|---|---|---|---|
| 3.8 m3/h | 3.8 m3/h | 50 Hz · model 50 Hz; @ 50 Hz unspecified | Source · OEM_SOURCE different frequency Pumping speed @ 50 Hz: 3.8Retrieved 2026-10-02 |
Ultimate pressure · Needs review · 3 observations / 1 sources
| As published | Normalized | Configuration / scope | Source / status |
|---|---|---|---|
| 5x10-4 mbar | 0.0005 mbar | Frequency not stated · range Without gas ballast partial unspecified | Source · OEM_SOURCE not a model rating Ultimate Pressure Without gas ballast partial: 5x10-4Retrieved 2026-10-02 |
| 2x10-3 mbar | 0.002 mbar | Frequency not stated · range Without gas ballast total unspecified | Source · OEM_SOURCE not a model rating Ultimate Pressure Without gas ballast total: 2x10-3Retrieved 2026-10-02 |
| 7x10-2 mbar | 0.07 mbar | Frequency not stated · range With gas ballast total unspecified | Source · OEM_SOURCE not a model rating Ultimate Pressure With gas ballast total: 7x10-2Retrieved 2026-10-02 |
Motor power · Sourced · 2 observations / 1 sources
Speed · Sourced · 2 observations / 1 sources
Noise level · Other conditions · 1 observations / 1 sources
| As published | Normalized | Configuration / scope | Source / status |
|---|---|---|---|
| ≤50 dB(A) | 50 dB(A) | 50 Hz · model 50 Hz; (50 Hz) unspecified | Source · OEM_SOURCE different frequency Noise Level (50 Hz): ≤50Retrieved 2026-10-02 |
Weight · Sourced · 1 observations / 1 sources
| As published | Normalized | Configuration / scope | Source / status |
|---|---|---|---|
| 21 kg | 21 kg | Frequency not stated · model Conditions not stated unspecified | Source · OEM_SOURCEWeight: 21Retrieved 2026-10-02 |
Dimensions · Not collected · 0 observations / 0 sources
No stored observation. A family brochure or a separate maximum rating does not fill this field.
Inlet connection · Not collected · 0 observations / 0 sources
No stored observation. A family brochure or a separate maximum rating does not fill this field.
Outlet connection · Not collected · 0 observations / 0 sources
No stored observation. A family brochure or a separate maximum rating does not fill this field.
Ambient temperature · Needs review · 1 observations / 1 sources
| As published | Normalized | Configuration / scope | Source / status |
|---|---|---|---|
| 10 - 40 oC | 10 °C | Frequency not stated · range Conditions not stated unspecified | Source · OEM_SOURCE not a model rating Ambient temperature: 10 - 40Retrieved 2026-10-02 |
Connection Flanges · Needs review · 1 observations / 1 sources · classification pending
| As published | Normalized | Configuration / scope | Source / status |
|---|---|---|---|
| 16 KF KF DN | — | Frequency not stated · model Conditions not stated unspecified | Source · OEM_SOURCEConnection flanges: 16 KFRetrieved 2026-10-02 |
Free Air Displacement 50 Hz · Needs review · 1 observations / 1 sources · classification pending
| As published | Normalized | Configuration / scope | Source / status |
|---|---|---|---|
| 4 m3/h | 4 m3/h | 50 Hz · model 50 Hz unspecified | Source · OEM_SOURCE different frequency Free Air Displacement @ 50 Hz: 4Retrieved 2026-10-02 |
Oil capacity · Sourced · 1 observations / 1 sources
| As published | Normalized | Configuration / scope | Source / status |
|---|---|---|---|
| 1150 ml | 1.15 l | Frequency not stated · model Conditions not stated unspecified | Source · OEM_SOURCEOil Capacity: 1150Retrieved 2026-10-02 |
Series Range Ultimate Pressure · Needs review · 1 observations / 1 sources · classification pending
| As published | Normalized | Configuration / scope | Source / status |
|---|---|---|---|
| 2x10 -3 mbar mbar | 0.002 mbar | Frequency not stated · range Conditions not stated unspecified | Source · OEM_SOURCE not a model rating Series range: Ultimate Pressure: 2x10 -3 mbarRetrieved 2026-10-02 |
Operating-performance coverage
Each row keeps its own configuration and relationship. Pending points are stored for review and excluded from shopper comparisons.
No versioned performance dataset has been collected for this model. Stored legacy points: 0; each retains its existing evidence status.
Document coverage
Categories follow recorded document types and linked extracted data. One document can appear in several categories. Family documents remain shared references; extraction does not imply approval.
| Category | Model links | Family links | Public sources |
|---|---|---|---|
| Specifications | 0 | 0 | Not collected |
| Performance curves / test data | 0 | 0 | Not collected |
| Operation / service manuals | 1 | 0 |
|
| Parts documentation | 0 | 0 | Not collected |
| Drawings / dimensions | 0 | 0 | Not collected |
| Product / family literature | 0 | 0 | Not collected |
| Other / unclassified | 0 | 0 | Not collected |