Controllable anti-pollution check valve EA type with union connectors, RV281
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| Check valves of this type are for use as an independent means of preventing reverse water flow and for installing directly after a water meter on central water supply systems. They can also be used for industrial, commercial and similar systems where back pressure, back flow and back syphonage must be prevented. The classicfications of appliances to meet these requirements are specified in EN 1717. |
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| Approvals |
DIN/DVGW, fully approved for noise level protection to class 1 |
| Media |
Water, compressed air, medium and light fuel oils, kerosene, petroleum with less than 15 percent aromatic content.
Not suitable for gaseous mediums below 0,5 bar, steam, heavy fuel oils or benzole. |
| Body material |
brass |
| Static pressure |
PN16 |
| Mounting position |
horizontal or vertical |
| Additional description |
Operating temperature with water 75 oC (short term up to 90 oC). With compressed air and other mediums up to 70 oC
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Universal application |
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Suitable for installation in any position |
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Creates no shock pressure loadings |
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Union connectors simplify service |
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Low pressure loss |
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Reliable, tried and tested |
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| Port connection type | Port diameter | DN size | Flow capacity Kvs | Type |
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| | inch | mm | | |
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| internal threads | 1/2 | 15 | 6 | RV281-1/2A  |
| internal threads | 3/4 | 20 | 8 | RV281-3/4A |
| internal threads | 1 | 25 | 20 | RV281-1A |
| internal threads | 1 1/4 | 32 | 28 | RV281-11/4A |
| internal threads | 1 1/2 | 40 | 40 | RV281-11/2A |
| internal threads | 2 | 50 | 65 | RV281-2A |
| Port connection type | Port diameter | DN size | Flow capacity Kvs | Type |
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| | inch | mm | | |
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| soldering | 1/2 | 15 | 6 | RV281-1/2B |
| soldering | 3/4 | 20 | 8 | RV281-3/4B |
| soldering | 1 | 25 | 20 | RV281-1B |
| soldering | 1 1/4 | 32 | 28 | RV281-11/4B |
| soldering | 1 1/2 | 40 | 40 | RV281-11/2B |
| soldering | 2 | 50 | 65 | RV281-2B |
