Description
EASY ADJUSTABLE VACUUM RELIEF VALVES
Vacuum flow valves for large blower type vacuum pumps
Product Overview
VRV-EA Series
ANVER easy adjustable Vacuum Relief Valves (VRV) are designed to protect vacuum pumps from internal damage due to a dead-head situation. VRVs allow a small amount of air into the vacuum pump, which cools the temperature and, in doing so, prevents overheating and possible damage.
VRVs can be preset to a preferred vacuum level in order to provide the proper amount of air to cool and protect your vacuum pump. You can set a predetermined vacuum level using a vacuum gauge in the system. The VRV can be mounted anywhere in the system manifold. Consider mounting the VRV close to the vacuum pump and gauge to make adjustments easily as needed. ANVER recommends purchasing vacuum gauges shown in specifications below. VRVs are an inexpensive way to insure your expensive regenerative vacuum pump.
Features
Construction
- Spring-loaded metal shaft and sealing cup
- Anodized aluminum construction for longevity and ruggedness
- Adjustable locking ring and internal bronze bearing for wear resistance
Operation
- Vibration resistant – holds settings
- Operational range from 6 in. to 21 in. of Hg
Service
- Easy access from the top to reset valve without removing it from the manifold
Applications
Recommended for most applications. VRVs are ideal for vacuum handling of non-porous loads, in addition to many other applications that may cause a vacuum pump to dead-head or burnout.
Specifications for Easy Adjustable VRV EA Types
| Part number | Type | Use with large variety of vacuum pumps including our model numbers | Overall height [in. (mm)] | Diameter [in. (mm)] | Thread size | Item weight [oz. (grams)] | Vacuum gauges available | 3D model |
|---|---|---|---|---|---|---|---|---|
 VRV-1-EA |
Easy externally adjustable type |  VB3HF, VB7HV, VB9HV |
3.50 – 4.38 (88.9 – 111.3) |
2.00 (50.8) | 1″ NPT male | 10.60 (300.5) |  |
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 VRV-112-EA |
Easy externally adjustable type | VB3HF, VB4HF, VB7HV, VB8HF, VB9HV |
3.50 – 4.38 (88.9 – 111.3) |
2.50 (63.5) | 1½″ NPT male | 14.64 (415) | |
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 VRV-2-EA |
Easy externally adjustable type | VB4HF, VB7HV, VB8HF, VB9HV |
3.50 – 4.38 (88.9 – 111.3) |
3.00 (76.2) | 2″ NPT male | 18.66 (529) | |
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Valve settings: In most cases, initial settings for the valve should be set slightly below the pump’s maximum vacuum level. Application types and user preferences determine what the maximum level should be. Load capacity must be adjusted accordingly, based on achieved vacuum at the vacuum attachment point.
Need more flow? If you need to get to a lower vacuum level or flow rate than the operational range from 6 in. to 21 in. of Hg, you can use a larger size VRV or double them up. Using a vacuum gauge and flow meter is recommended to set the valves in critical applications.
Vacuum Relief Valve Add-On Kits for Regenerative Pumps
Add-on kit
| Part no. | Description |
|---|---|
 VRV-112-KIT-4 |
Vacuum relief valve add-on kit for VB4HF-S vacuum station and used with -4-SDE sound deadening enclosure, 1½″ NPT |
 VRV-112-KIT-7/9 |
Vacuum relief valve add-on kit for VB7HV and VB9HV vacuum stations, 1½″ NPT |
 VRV-112-KIT-7-SDE |
Vacuum relief valve add-on kit for VB7HV vacuum station, 1½″ NPT |
 VRV-112-KIT-9-SDE |
Vacuum relief valve add-on kit for VB9HV vacuum station, 1½″ NPT |
 VRV-2-KIT-8/11 |
Vacuum relief valve add-on kit for VB8HF or VB11HV vacuum station, 2″ NPT |
 VRV-2-KIT-8-SDE |
Vacuum relief valve add-on kit for VB8HF vacuum station, 2″ NPT |
Related Products
1/2″ and 3/4″ low flow vacuum relief valves
Recommended vacuum gauges for these valves
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