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| | | HYDRAULIK | | |
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| | | Check valves with release type RH and DRH | | |
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| | | | | | | | | | Nomenclature: | Check valve with | | | | ■ | hydraulic release ■ | | | | 1 Design: | 1- Individual valve for | | | | | in-line installation | | | | ■ | Manifold mounting valve ■ | | | | ■ Actuation: ■ | 1 Hydraulic ■ | | | | -1 pmax: ■ | 1 700...400 bar ■ | | | | ■ Q : ^max | 1 15...160 lpm | | | | | | | | | |
| | | The check valves with hydraulic release type RH and DRH are used for blocking one or two consumer lines, as hydraulically actuated drain valves, or idle circulation valves. The valves may be optionally equipped with a pre-release, for one or both connection sides, to prevent decompression surges in the event of high pressure and high consumer flows. The type DRH has many variations and options such as in-line design, manifold mounting design, shock valves, pressure limiting valves to prevent slow pressure rises, and a leakage port to prevent unintended opening of the valve due to pressure rises, caused be leaking spool valves. | | |
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| | | Basic types and general parameters | | |
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| | | | | | | | | | | | | Basic type | Flow | Oper. pressure | Release | Tapped ports | | | | and size | Qmax (lpm) | pmax (bar) | ratio | (BSPP) | | | | | | | pA(B) /pZ | A, B, C, D Z | | | | RH 1 | 15 | 700 | 2.7 | J G 1/4 | | | | RH 2 | 35 | 700 | 3 | G 3/8 | | | | RH 3 | 55 | 500 | 2.4 | G 1/2 G 1/4 | | | | RH 4 | 100 | 500 | 2.4 | G 3/4 | | | | RH 5 | 160 | 500 | 3 | G1 | | | | DRH 1 | 16 | 500 | 2.5 | G 1/4 | | | | DRH 2 | 30 | 500 | 2.5 | G 3/8 | | | | DRH 3 | 60 | 500 | 2.5 | G 1/2 -- | | | | DRH 4 | 90 | 400 | 2.5 | G 3/4 | | | | DRH 5 | 140 | 400 | 2.5 | G1 | | | | | | | | | | | | |
| | | Symbol | | |
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| | | A rii rI | | |
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| | | AI IB 00 | | |
| | | 2 | | |
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| | | crii | | |
| | | 5 | | |
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| | | Additional versions • Check valves with release and pre-release type RH.V • Double check valve with shock valves suited for hydraulic motors to prevent slow pressure rises | | |
| | | • Manifold mounting double check valve type DRH3P Double check valves with leakage port to prevent unintended opening of the valve due to pressure rises, caused be leaking spool valves. | | |
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| | | Order examples RH 2 DRH 1 Releasable check valve type RH, size 2 Releasable check valve (double valve) type DRH, size 1 | | |
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| | | 2.5-14 | | 2005 | | |
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