Pressure relief valve, direct operated Type DBD R 2542 dition: 21-7 Replaces: 214-8 Size 3 Component series 1X Maximum operating pressure 3bar [915 psi] Maximum flow 33 l/min [87 US gpm] H5585 Features As screw-in cartridge valve (cartridge) For threaded connection For subplate mounting Adjustment types for pressure adjustment, optionally: Bushing with hexagon and protective cap Rotary knob Hand wheel Lockable rotary knob Contents Features 1 Ordering code 2, 3 Function, section, symbol 3 Technical data 4 Characteristic curves 5 Dimensions 1 Type-examination tested safety valves type DBD according to Pressure quipment Directive 214/8/U (in the following shortly PD) Ordering code 11 Deviating technical data 12 Dimensions 12 Deviating dimensions 13 Characteristic curves 14 Safety instructions 15 Characteristic curves 15 19 Further information 2 R 2542, edition: 21-7, Bosch Rexroth AG
2/2 DBD Pressure relief valve Ordering code 1 2 3 4 5 7 8 9 1 DBD 1X / * 1 Pressure relief valve, direct operated DBD Adjustment type for pressure adjustment 2 NG NG8 NG1 NG15 NG2 NG25 NG3 Bushing with hexagon and protective cap S Rotary knob 1) H Hand wheel 2) H Lockable rotary knob 1; 3; 4) A 3 Size (port G1/4) Size 8 (port G3/8) 8 Size 1 (port G1/2) 1 Size 15 (port G3/4) 15 Size 2 (port G1) 2 Size 25 (port G1 1/4) 25 Size 3 (port G1 1/2) 3 Type of connection 4 NG NG8 NG1 NG15 NG2 NG25 NG3 As screw-in cartridge valve (cartridge) K For threaded connection 5) G For subplate mounting P 5 Component series 1... 1Z (1... 1Z: unchanged installation and connection dimensions) 1X Pressure rating ) NG NG8 NG1 NG15 NG2 NG25 NG3 Set pressure up to 25 bar [32 psi] 25 Set pressure up to 5 bar [725 psi] 5 Set pressure up to 1 bar [145 psi] 1 Set pressure up to 2 bar [29 psi] 2 Set pressure up to 315 bar [458 psi] 315 Set pressure up to 4 bar [58 psi] 4 Set pressure up to 3 bar [915 psi] 7) 3 Seal material 7 NBR seals no code FKM seals V Observe compatibility of seals with hydraulic fluid used! (Other seals upon request) Line connection 8 Pipe thread according to ISO 228/1 no code SA thread 12 quipment Directive 9 Without type-examination procedure no code Type-examination tested safety valve according to PD 214/8/U 8) 1 For further information, see the plain text xplanation of the footnotes see page 3. Notice: Preferred types and standard units are contained in the PS (standard price list). Bosch Rexroth AG, R 2542, edition: 21-7
Pressure relief valve DBD 3/2 Ordering code 1) With size 2, only available for the pressure ratings 25, 5 or 1 bar. 2) Only available for the pressure ratings 25, 5 or 1 bar. 3) Key with material no. R98158 is included in the scope of delivery. 4) Not available for type-examination tested safety valves. 5) Not available for type-examination tested safety valves of size 8, 15 and 25. ) When selecting the pressure rating, please observe the characteristic curves and notes on page 5. 7) With version "G" and "P", only available as "SO292", see page and 9. 8) See ordering code on page 11. Function, section, symbol Pressure relief valves of type DBD are direct operated seat valves. They are used for limiting a system pressure. The valves basically consist of sleeve (1), spring (2), poppet with damping piston (3) (pressure rating 25... 4 bar) or ball (4) (pressure rating 3 bar) and adjustment type (5). The system pressure can be set steplessly via the adjustment type (5). The spring (2) pushes the poppet (3) or the ball (4) onto the seat. Channel P is connected to the system. The pressure existing in the system acts on the poppet surface (or the ball). If the pressure in channel P exceeds the value set at the spring (2), the poppet (3) or the ball (4) opens against the spring (2). Now, hydraulic fluid from channel P flows into channel T. The stroke of the poppet (3) is limited by the embossing (). In order to achieve good pressure adjustment over the entire pressure range, the entire pressure range has been divided into 7 pressure ratings. One pressure rating corresponds to a certain spring for a maximum operating pressure that can be set by means of that spring. T P Symbol T 5 1 2 T 3 Type DBDS..K1X/ Version pressure rating 25 4 bar (poppet seat valve) 5 1 2 4 Type DBDH 1 K1X/ Version pressure rating 3 bar (ball seat valve, only NG1) T T P P P Notes: The adjustment type (5) is constructed so that it cannot be lost. Due to the gimbalmounting, the adjustment element remains loose (movable) in the adjustment type (5) in case of complete unloading. Pressure rating "25": If despite completely unloaded adjustment type, the minimum pressure does not settle, the adjustment element has to be "pulled back" to the stop due to the low spring and/or restoring force. For pressure adjustment / increase, the adjustment element can then be screwed in again. P R 2542, edition: 21-7, Bosch Rexroth AG
4/2 DBD Pressure relief valve Technical data (For applications outside these parameters, please consult us!) general Size NG, 8 1 15, 2 25, 3 Weight See pages, 8 and 1 Installation position Any Ambient temperature range C [ F] 3 +8 [ 22 +17] (NBR seals) 15 +8 [5 17] (FKM seals) Minimum stability of the housing materials Housing materials are to be selected so that there is sufficient safety for all imaginable operating conditions (e.g. with regard to pressure resistance, thread stripping strengths and tightening torques). hydraulic Maximum operating pressure Input bar [psi] 4 [58] 3 [915] 4 [58] 315 [458] Output bar [psi] 315 [458] 315 [458] 315 [458] 315 [458] Maximum flow (standard valves) See characteristic curves page 5 Hydraulic fluid See table below Hydraulic fluid temperature range C [ F] 3 +8 [ 22 +17] (NBR seals) 15 +8 [5 17] (FKM seals) Viscosity range mm 2 /s [SUS] 1 8 [ 371] Maximum admissible degree of contamination of the hydraulic fluid; Class 2/18/15 1) Cleanliness class according to ISO 44 (c) Hydraulic fluid Classification Suitable Standards Data sheet sealing materials Mineral oils HL, HLP, HLPD, HVLP, HVLPD NBR, FKM DIN 51524 922 Bio-degradable Insoluble in water HTG FKM ISO 1538 HS FKM 9221 Soluble in water HPG FKM ISO 1538 Important notes on hydraulic fluids: Bio-degradable and flame-resistant: If this hydraulic fluid is For more information and data on the use of other hydraulic used, small amounts of dissolved zinc may get into the hydraulic fluids, please refer to the data sheets above or contact us. system. There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.). The ignition temperature of the hydraulic fluid used must be 5 K higher than the maximum solenoid surface temperature. 1) The cleanliness classes specified for the components must be adhered to in hydraulic systems. ffective filtration prevents faults and simultaneously increases the life cycle of the components. For the selection of the filters, see www.boschrexroth.com/filter. Deviating technical data for type-examination tested safety valves can be found on page 12. Notice: Hydraulic counter pressures in port T add 1:1 to the response pressure of the valve set at the adjustment type. xample: Pressure adjustment of the valve due to spring preload (item 2 on page 3) p spring = 2 bar Hydraulic counter pressure in port T: p hydraulic = 5 bar Response pressure = p spring + p hydraulic = 25 bar Bosch Rexroth AG, R 2542, edition: 21-7
Pressure relief valve DBD 5/2 Characteristic curves (measured with HLP4, ϑ oil = 4 ±5 C [14 ±9 F]) Size Size 8 and 1 Operating pressure in bar [psi] [52] [] [5] [4] [3] [2] [1] [] 45 4 3 2 1 5 1 1 2 3 4 5 Operating pressure in bar [psi] [9427] [8] [7] [] [5] [4] [3] [2] [1] [] 5 5 4 3 2 1 5 1 2 4 8 1 12 [] [2] [4] [] [8] [1] [12] [13.2] Flow in l/min [US gpm] [] [4] [8] [12] [1] [2] [24] [28] [31.7] Flow in l/min [US gpm] 1 = minimum adjustable pressure = pressure rating 3 bar [915 psi] (only NG1) Size 15 and 2 Size 25 and 3 Operating pressure in bar [psi] [52] [] [5] [4] [3] [2] [1] 45 4 3 2 1 5 Operating pressure in bar [psi] [57] [4] [3] [2] [1] 35 3 25 2 15 1 5 [] 5 1 15 2 25 [] 1 2 3 35 [] [1] [2] [3] [4] [5] [][] Flow in l/min [US gpm] [] [1] [2] [3] [4] [5] [] [7] [8] [92.5] Flow in l/min [US gpm] Notes: The characteristic curves apply to the pressure at the valve output p = bar across the entire flow range. The characteristic curves only apply with the specified environmental and temperature conditions. It has to be noted that the development of the characteristic curve will be influenced in case of deviating boundary conditions. The characteristic curves refer to the specified pressure ratings (e.g. 2 bar). The more the set pressure value differs from the nominal pressure rating (e.g. < 2 bar), the larger the pressure increase with increasing flow gets. R 2542, edition: 21-7, Bosch Rexroth AG
/2 DBD Pressure relief valve Dimensions: Threaded connection (dimensions in mm [inch]) D1 D4; T2 4 1.1 D2; T1 B1 1,5 [.] = (P) H1 H2 T P = L1 L2 2 L3 L L5 T L4 P D3 (P) 3 B1 B2 1.1 Adjustment type "S" (example) Grub screw with hexagon and protective cap; internal hexagon (NG NG2) external hexagon (NG25 and 3) 2 Name plate 3 4 valve mounting bores 4 Additional port (P), optional (e.g. for pressure measurement); not possible for NG1 and pressure rating > 4 bar (= version "SO292"). Dimensions see dimensions D4, tightening torque see table below. For the versions and dimensions of the adjustment types refer to page 7 and 8. Tightening torques M A in Nm [ft-lbs] for fittings 1) NG B1 B2 ØD1 D2 ØD3 D4 Plug screw (4) Pipe fittings 45 [1.77] [2.3] 25 [.98] M. [.2] G1/4 3 [22] [44] 8 [2.3] 8 [3.15] 28 [1.1] M8 9 [.35] G3/8 4 [29] 9 [] 1 [2.3] 8 [3.15] 34 [1.34] M8 9 [.35] G1/2 [44] 13 [95] 15 7 [2.7] 1 [3.94] 42 [1.5] M8 9 [.35] G3/4 8 [59] 2 [147] 2 7 [2.7] 1 [3.94] 47 [1.85] M8 9 [.35] G1 135 [99] 38 [28] 25 1 [3.94] 13 [5.12] 5 [2.21] M1 11 [.43] G1 1/4 48 [354] 5 [38] 3 1 [3.94] 13 [5.12] 5 [2.5] M1 11 [.43] G1 1/2 5 [413] [442] NG H1 H2 L1 L2 L3 L4 L5 L T1 T2 Weight, approx. in kg [lbs] 25 [.98] 4 [1.57] 8 [3.15] 4 [.1] 15 [.59] 55 [2.17] 4 [1.57] 2 [.79] 1 [.39] 12 [.47] 1.5 [3.3] 8 4 [1.57] [2.3] 1 [3.94] 4 [.1] 2 [.79] 7 [2.7] 48 [1.89] 21 [.83] 15 [.59] 12 [.47] 3.7 [8.2] 1 4 [1.57] [2.3] 1 [3.94] 4 [.1] 2 [.79] 7 [2.7] 48 [1.89] 21 [.83] 15 [.59] 14 [.55] 3.7 [8.2] 15 5 [1.97] 7 [2.7] 135 [5.32] 4 [.1] 2 [.79] 1 [3.94] 5 [2.5] 34 [1.34] 18 [.71] 1 [.3].4 [14.1] 2 5 [1.97] 7 [2.7] 135 [5.32] 5.5 [.22] 2 [.79] 1 [3.94] 5 [2.5] 34 [1.34] 18 [.71] 18 [.71].4 [14.1] 25 [2.3] 9 [3.54] 18 [7.9] 5.5 [.22] 25 [.98] 13 [5.12] 85 [3.35] 35 [1.38] 2 [.79] 2 [.79] 13.9 [3.] 3 [2.3] 9 [3.54] 18 [7.9] 5.5 [.22] 25 [.98] 13 [5.12] 85 [3.35] 35 [1.38] 2 [.79] 22 [.87] 13.9 [3.] 1) The tightening torques are guidelines, referring to the maximum operating pressure and when using a manual torque wrench (tolerance ±1%). Bosch Rexroth AG, R 2542, edition: 21-7
Pressure relief valve DBD 7/2 Dimensions: Screw-in cartridge valve (dimensions in mm [inch]) ØD12 L21 11 L23 L22 ØD13 SW3 SW2 1 L18 L19 ØD12 SW2 SW3 SW1; MA L19 L18 L2 1 1.2 1 8 1.3 L2 SW1; MA SW L17 1 ØD11 Ø2,5 1.1 SW1; MA SW2 SW3 SW5 L24 L17 ØD11 SW1; M A SW4 SW3 SW2 SW1; M A 1.2 1 7,8- / Pt 2 12 Ø,5 A A D14 ØD15 α1 A,2,8- / Pt 2 L31 ØD1 ØD19-,2 1) L3 L29 L27 L25 L2 45 L28 9 5,5 x 45 2) -,2 +,2 Rz 32 ØD1 ØD17 ØD18 Ø,1 A Rz3 1 4 1) Maximum dimension 2) All seal ring insertion faces are rounded and free of burrs Tolerance for all angles ±.5 Dimensional tables and item explanations see page 8. R 2542, edition: 21-7, Bosch Rexroth AG
8/2 DBD Pressure relief valve Dimensions: Screw-in cartridge valve (dimensions in mm [inch]) Screw-in cartridge valve NG ØD11 ØD12 ØD13 L17 L18 L19 L2 L21 L22 L23 L24 34 [1.34] [2.3] 72 [2.83] 11 [.43] 83 [3.2] 28 [1.1] 2 [.79] 4.5 [2.54] 1 38 [1.5] [2.3] 8 [2.8] 11 [.43] 79 [3.11] 28 [1.1] 2 [.79] 77 [3.3] 2 48 [1.89] [2.3] 5 [2.5] 11 [.43] 77 [3.3] 28 [1.1] 2 [.79] 1 [4.17] 3 3 [2.48] 8 [3.15] 83 [3.2] 11 [.43] 5 [2.21] 131 [5.1] Tightening torques M A in Nm [ft-lbs] for screw-in cartridge valves 2) Pressure rating in bar [psi] NG SW1 SW2 SW3 SW4 SW5 SW up to 2 [29] up to 4 [58] up to 3 [915] Weight, approx. in kg [lbs] 32 3 19 3 5±5 [37±3.7] 8±5 [59±4].4 [.88] 1 3 3 19 3 1±5 [74±3.5] 15±1 [11±3.5] 2±1 [148±7.5].5 [1.1] 2 4 3 19 3 15±1 [111±7.5] 3±15 [221±11] 1 [2.21] 3 4 19 13 35±2 [258±19.5] 5±3 [39±22] 2.2 [4.85] 2) The tightening torques are guidelines with a friction coefficient µ total =.12 and when using a manual torque wrench. Mounting cavity NG D14 ØD15 ØD1 ØD17 ØD18 ØD19 M28 x 1.5 [.24] 15 [.59] 25H9 [.9843+,2] 24.9 +.152 [+.] 12 [.47] [.983].2 [.78] 1 M35 x 1.5 1 [.39] 18.5 [.73] 32H9 [1.2598+.24] 31.9 +.12 [+.4] 15 [.59] [1.2559].2 [.79] 2 M45 x 1.5 2 [.79] 24 [.95] 4H9 [1.5748+.24] 39.9 +.12 [+.3] 22 [.87] [1.579].2 [.79] 3 M x 2 3 [1.18] 38.75 [1.53] 55H9 [2.154+.29] 54.9 +.174 [+.9] 34 [1.34] [2.114].2 [.79] NG L25 L2 L27 L28 L29 L3 L31 α1 15 [.59] 19 [.75] 3 [1.18] 3 [1.42] 45 [1.77] 5,5±5,5 [2.22±.217] 5 [2.5] 15 1 18 [.71] 23 [.91] 35 [1.38] 41.5 [1.3] 52 [2.5] 7.5±7.5 [2.±.295] 8 [3.15] 15 2 21 [.83] 27 [1.] 45 [1.77] 55 [2.17] 7 [2.7] 91.5±8.5 [3. ±.335] 11 [4.33] 2 3 23 [.91] 29 [1.14] 45 [1.77] 3 [2.48] 84 [3.31] 113.5±11.5 [4.47±.453] 14 [5.51] 2 1.1 Adjustment type "S" Grub screw with hexagon and protective cap; internal hexagon (NG NG2), external hexagon (NG3) 1.2 Adjustment type "H" rotary knob (NG NG2), hand wheel (NG3) 1.3 Adjustment type "A" lockable rotary knob NG NG1 (NG2 up to 1 bar [145 psi]) 4 Port P, at any place at the circumference or at the front side 5 Port T, at any place at the circumference Type designation 7 Pressure rating (stamped in) 8 Marking (adjustment of the zero position after the valve has been screwed in; then fixing of the ring by horizontal shifting until it engages on the plug screw SW). 9 Depth of fit 1 Lock nut, tightening torque M A = 1 +5 Nm [7.4 +3.7 ft-lbs] 11 Space required to remove the key 12 Minimum stability of the housing materials, see Technical data page 4. Bosch Rexroth AG, R 2542, edition: 21-7
Pressure relief valve DBD 9/2 Dimensions: Subplate mounting (dimensions in mm [inch]) T P (P) H2 D8; T2 D1 D9; T3 H3 5 1,5 [.2] [.] [Ø.23] L1 L2 15 1.1 L8 L1 = L7 L9 L11 L12 = L12 L3 L4 D3 3 12 L17 D11; T T P (P) B1 B2 13 14 3 R1 T P B3 B4 L18 L L5 2 4 L13 L14 L15 L1 D5 D7; T5 D; T4,1/1 [.4/4.] Rz1max 4 Required surface quality of the valve contact surface 1.1 Adjustment type "S" (example) Grub screw with hexagon and protective cap; internal hexagon (NG NG2), external hexagon (NG3) 2 Name plate 3 4 valve mounting bores 4 Additional port (P), optional (e.g. for pressure measurement); not possible for NG1 and pressure rating > 4 bar (= version "SO292"). Tightening torques see dimensional table on page ) 12 Subplate (type designation see table on page 1) 13 Valve contact surface 14 Front panel break-through 15 Locking pin (only with type-examination tested safety valves) For reasons of stability, exclusively the following valve mounting screws may be used (separate order): 4 hexagon socket head cap screws ISO 472 - flzn-24h-l 1) (friction coefficient µ total =.9.14) NG Dimension Property class M A in Nm [ft-lbs] 2) Material number M x 5 1.9 12.5 [9.2] R913151 1 M8 x 7 1.9 28 [2.7] R913149 2 M8 x 9 12.9 28 [2.7] R91315 3 M1 x 11 12.9 5 [41.3] R913148 4 hexagon socket head cap screws UNC upon request For the versions and dimensions of the adjustment types refer to page 7 and 8. 1) As replacement, you can also use specified screws according to DIN 912. 2) For tightening, use a manual torque wrench with a tolerance 1%. R 2542, edition: 21-7, Bosch Rexroth AG
1/2 DBD Pressure relief valve Dimensions: Subplate mounting (dimensions in mm [inch]) Pressure relief valve NG B1 B2 ØD3 H2 L1 L2 L3 45 [1.77] [2.3]. [.2] 4 [1.57] 8 [3.15] 4 [.1] 15 [.59] 1 [2.3] 8 [3.15] 9 [.35] [2.3] 1 [3.94] 4 [.1] 2 [.79] 2 7 [2.7] 1 [3.94] 9 [.35] 7 [2.7] 135 [5.32] 5.5 [.22] 2 [.79] 3 1 [3.94] 13 [5.12] 11 [.43] 9 [3.54] 18 [7.9] 5.5 [.22] 25 [.98] NG L4 L5 L L18 Port P Weight, approx. in kg [lbs] 55 [2.17] 4 [1.57] 2 [.79] 15 [.59] G1/4 1.5 [3.3] 1 7 [2.7] 45 [1.77] 21 [.83] 15 [.59] G1/2 3.7 [8.2] 2 1 [3.94] 5 [2.5] 34 [1.34] 15 [.59] G3/4.4 [14.1] 3 13 [5.12] 85 [3.35] 35 [1.37] 15 [.59] G1 1/4 13.9 [3.] Subplates NG Type B3 B4 ØD5 ØD D7 ØD8 D9 G3/1 [G3/12] 45 [1.77] [2.3]. [.2] 11 [.43] M [1/4-2 UNC] 25 [.98] G1/4 [SA 4; 7/1-2] 1 G1//1 [2.3] 8 [3.15]. [.2] 11 [.43] M8 25 [.98] G3/8 G2/1 [2.3] 8 [3.15]. [.2] 11 [.43] M8 34 [1.34] G1/2 2 G33/1 7 [2.7] 1 [3.94] 11 [.43] 18 [.71] M8 42 [1.5] G3/4 G34/1 7 [2.7] 1 [3.94] 11 [.43] 18 [.71] M8 47 [1.85] G1 3 G35/1 1 [3.94] 13 [5.12] 11 [.43] 18 [.71] M1 5 [2.2] G1 1/4 G3/1 1 [3.94] 13 [5.12] 11 [.43] 18 [.71] M1 5 [2.5] G1 1/2 NG ØD1 ØD11 H3 L7 L8 L9 L1 L11 L12 [.24] 8 [.32] 25 [.98] 11 [4.33] 8 [.32] 94 [3.7] 22 [.87] 55 [2.17] 1 [.39] 1 1 [.39] 8 [.32] 25 [.98] 135 [5.32] 1 [.39] 115 [4.53] 27.5 [1.8] 7 [2.7] 12.5 [.49] 1 [.39] 8 [.32] 25 [.98] 135 [5.32] 1 [.39] 115 [4.53] 27.5 [1.8] 7 [2.7] 12.5 [.49] 2 15 [.59] 8 [.32] 4 [1.57] 17 [.9] 15 [.59] 14 [5.51] 2 [.79] 1 [3.94] 2 [.79] 2 [.79] 8 [.32] 4 [1.57] 17 [.9] 15 [.59] 14 [5.51] 2 [.79] 1 [3.94] 2 [.79] 3 3 [1.18] 8 [.32] 4 [1.57] 19 [7.48] 12.5 [.49] 15 [.5] 17.5 [.7] 13 [5.12] 22.5 [.89] NG L13 L14 L15 L1 L17 T2 T3 T4 T5 39 [1.54] 42 [1.5] 2 [2.44] 5 [2.5] 15 [.59] 1 [.39] 15 [.59] 9 [.35] 15 [.59] 1 4.5 [1.59] 48.5 [1.91] 72.5 [2.85] 8.5 [3.17] 15 [.59] 1 [.39] 15 [.59] 9 [.35] 12 [.47] 4.5 [1.59] 48.5 [1.91] 72.5 [2.85] 8.5 [3.17] 15 [.59] 1 [.39] 1 [.3] 9 [.35] 15 [.59] 2 45 [1.77] 54 [2.13] 85 [3.35] 94 [3.7] 15 [.59] 1 [.39] 2 [.79] 13 [.51] 22 [.87] 42 [1.5] 54 [2.13] 85 [3.35] 97 [3.82] 15 [.59] 1 [.39] 2 [.79] 13 [.51] 22 [.87] 3 42 [1.5] 52.5 [2.7] 12.5 [4.4] 113 [4.45] 15 [.59] 1 [.39] 24 [.95] 11.5 [.45] 22 [.87] NG T R1 Weight, approx. in kg [lbs] [.24] 25 +2 [.98 +.79 ] 1.5 [3.3] 1 [.24] 3 +5 [1.18 +.197 ] 2 [4.4] 2 [.24] 4 +3 [1.57 +.118 ] 5.5 [12.1] Notice: The specified subplates are not approved for use with typeexamination tested safety valve according to Pressure quipment Directive 214/8/U! 3 [.24] 55 +4 [2.1 +.157 ] 8 [17.] Bosch Rexroth AG, R 2542, edition: 21-7
Pressure relief valve DBD 11/2 Type-examination tested safety valves The functionality of these valves corresponds to that of the standard series (see page 3). Valves of type DBD..1X/.. are, however, type-examination tested pressure relief valves according to the Pressure quipment Directive 214/8/U and intended for use as safety valves. At the factory, the response pressure is set to a fixed maximum value using the adjustment type. Afterwards, the safety valve is sealed and/or secured using a safety cap which cannot be disassembled in non-destructive manner. The safety valves are available with graded response pressures (in 5 bar steps). The valve version provided with a safety cap can no longer be adjusted. With valve versions equipped with rotary knob or hand wheel, the valve spring can be unloaded by the user and a response pressure lower than the factory setting can be set without the need of removing the lead seal. Ordering code: Type-examination tested safety valves type DBD 1) NG Type designation Component marking 1 DBDS K1X/ DBDH K1X/ DBDS G1X/ DBDH G1X/ DBDS P1X/ DBDH P1X/ DBDS 1K1X/ DBDH 1K1X/ DBDS 1G1X/ DBDH 1G1X/ DBDS 1P1X/ DBDH 1P1X/ TÜV.SV. 849.5.F. α w.p. G TÜV.SV. 85..F. α w.p. G TÜV.SV. 39.4,5.F.3.p. 2) Pressure in the type designation is to be entered by the customer; pressure adjustment 3 bar [435 psi] and possible in 5 bar [72 psi] steps. Information is entered at the factory NG Type designation Component marking 2 3 DBDS 2K1X/ DBDH 2K1X/ DBDS 2G1X/ DBDH 2G1X/ DBDS 2P1X/ DBDH 2P1X/ DBDS 3K1X/ DBDH 3K1X/ DBDS 3G1X/ DBDH 3G1X/ DBDS 3P1X/ DBDH 3P1X/ TÜV.SV. TÜV.SV. 31.1.F.α w.p. 32.15.F.α w.p. 1) Component series 1X according to the Pressure quipment Directive 214/8/U 2) Component marking for DBD. 1.1X/...; 4 bar [581 psi] < p 3 bar [915 psi] R 2542, edition: 21-7, Bosch Rexroth AG
12/2 DBD Pressure relief valve Deviating technical data: Type-examination tested safety valves type DBD 1) general Ambient temperature range C [ F] 1 +8 [+14 +17] hydraulic Set response pressure bar [psi] See last figure of the component marking page 11 Maximum counter pressure in the discharge line bar [psi] See characteristic curves page 15 19 Maximum flow l/min [US gpm] The last but one figure of the component marking attached at the safety valve is always binding, see page 11. For valve types which have a variable maximum flow depending on the response pressure, the discharge coefficient is specified at this place (see page 14). Hydraulic fluid Hydraulic fluids according to DIN 51524: Hydraulic oils HL and HLP are suitable for safety valves with NBR or FKM seals. Hydraulic fluid temperature range C [ F] 1 + [+14 +14] Viscosity range mm 2 /s [SUS] 12 23 [55 1] 1) Component series 1X, according to Pressure quipment Directive 214/8/U (For applications outside these parameters, please consult us!) Dimensions: Sheet cut-out for front panel mounting with type-examination tested safety valves type DBD 1) (dimensions in mm [inch]) H2 R1 NG B1 B2 H1 H2 45 [1.77] 12.5 [.49] 25 [.98] 22.5 [.89] 1 [2.3] 2.5 [.81] 4 [1.57] 2.5 [.81] 2 7 [2.7] 24 [.94] 5 [1.97] 24 [.94] 3 1 [3.94] 29.5 [1.1] [2.3] 29.5 [1.1] NG ØD1H13 ØD2H13 R1 7 [.27] 4 [1.57] 8 [.32] H1 ØD2 B2 ØD1 1 9 [.35] 44 [1.73] 8 [.32] 2 9 [.35] 55 [2.17] 8 [.32] 3 11 [.43] 73 [2.87] 8 [.32] Notice: With valves type DBDH.K..1X/.., the hand wheel must be removed before the front panel assembly of the screw-in cartridge valve and reassembled afterwards. ØD1 B1 1) Component series 1X according to the Pressure quipment Directive 214/8/U Bosch Rexroth AG, R 2542, edition: 21-7
Pressure relief valve DBD 13/2 Deviating dimensions: Cartridge valve as type-examination tested safety valve type DBD 1) (dimensions in mm [inch]) L18 ØD12 ØD11 ØD13 L19 2) SW3 SW2 SW1; M A L23 1) L22 1.2 1.2 SW3 1 1 SW2 SW1; M A L24 L17 1.4 SW1; M A 7 NG ØD11 ØD12 ØD13 L17 L18 L19 L22 L23 L24 34 [1.34] [2.3] 8 [3.15] 11 [.43] 83 [3.2] 4,5 [2.54] 1 38 [1.5] [2.3] 7,5 [3.1] 11 [.43] 79 [3.11] 78,5 [3.9] 2 48 [1.89] [2.3] 72,5 [2.85] 11 [.43] 77 [3.3] 17 [4.21] 3 3 [2.48] 8 [3.15] 93 [3.] 11 [.43] 5 [2.21] 134 [5.28] Tightening torques M A in Nm [ft-lbs] for screw-in cartridge valves 3) Pressure rating in bar [psi] NG SW1 SW2 SW3 up to 2 [29] up to 4 [58] up to 3 [915] Weight, approx. in kg [lbs] 32 3 19 5±5 [37±3.7] 8±5 [59±4],4 [.88] 1 3 3 19 1±5 [74±3.5] 15±1 [11±3.5] 2±1 [148±7.5],5 [1.1] 2 4 3 19 15±1 [111±7.5] 3±15 [221±11] 1 [2.21] 3 4 19 35±2 [258±19.5] 5±3 [39±22] 2,2 [4.85] 1.2 Adjustment type "H" rotary knob (NG NG2), hand wheel (NG3) 1.4 Adjustment type "S" hexagon with safety cap 4 Port P, at any place at the circumference or at the front side Type designation 7 Pressure rating (stamped in) 1 Lock nut, tightening torque M A = 1 +5 Nm [7.4 +3.7 ft-lbs] 1) Component series 1X according to the Pressure quipment Directive 214/8/U 2) Maximum dimension with lowest set response pressure 3) The tightening torques are guidelines with a friction coefficient µ total =.12 and when using a manual torque wrench. R 2542, edition: 21-7, Bosch Rexroth AG
14/2 DBD Pressure relief valve Characteristic curves: Type-examination tested safety valves type DBD 1) [915] 3 Size 1 Operating pressure in bar [psi] [581] 4 [4351] 3 [291] 2 [11] 111 [145] 1 [11] 8 [87] [725] [58] [435] 5 4 Size 3 12 2 28 3 44 52 Operating pressure in bar [psi] [581] 4 [4351] 3 [291] 2 [248] 171 [232] 1 [217] 15 [174] 12 [145] 1 [11] 8 [87] [725] [58] 5 4 [435] 3 2 4 8 1 12 14 [] [2] [4] [] [8] [1] [12] [13.7] Flow in l/min [US gpm] [] [5] [1] [15] [2] [25] [3] [37] Flow in l/min [US gpm] Operating pressure in bar [psi] [581] 4 [4583] 31 [4351] 3 28 [3771] 2 24 [319] 22 [291] 2 [21] 18 [232] 1 [23] 14 [174] 12 [145] 1 [11] [87] [725] [58] [435] 8 5 4 Size 2 Size 3 3 9 12 15 18 Operating pressure in bar [psi] [581] 4 [4583] 31 [4351] 3 28 [3771] 2 [319] 22 22 [291] 2 [21] 18 [232] 1 [23] 14 [174] 12 [145] 1 [11] [87] [725] [58] 8 5 4 [435] 3 12 18 24 3 3 [] [5] [1] [15] [2] [25] [3] [35] [4] [47.5] Flow in l/min [US gpm] [] [1] [2] [3] [4] [5] [] [7] [8] [95] Flow in l/min [US gpm] Notice: Value pairs located in the areas of the characteristic curves with gray background can not be realized with the safety valve. The characteristic curves shown here are only valid for a counter pressure of bar in the discharge line. 1) Component series 1X according to the Pressure quipment Directive 214/8/U Bosch Rexroth AG, R 2542, edition: 21-7
Pressure relief valve DBD 15/2 Safety instructions: Type-examination tested safety valves type DBD 1) Before ordering a type-examination tested safety valve, it must be observed that for the desired response pressure p, the maximum admissible flow q Vmax of the safety valve must be larger than the maximum possible flow of the system/accumulator to be secured. According to the Pressure quipment Directive 214/8/U, the increase in the system pressure due to the flow must not exceed 1% of the set response pressure (see component marking on page 11). The maximum admissible flow q Vmax stated in the component marking must not be exceeded. Discharge lines of safety valves must end in a risk-free manner. The accumulation of fluids in the discharge system must not be possible (see data sheet AD2 A2). It is imperative to observe the application notes! In the plant, the response pressure specified in the component marking is set at a flow of 2 l/min [.53 US gpm]. The maximum flow stated in the component marking applies for applications without counter pressure in the discharge line (port T). By removing the lead seal at the safety valve, the approval according to the Pressure quipment Directive becomes void! Basically, the requirements of the Pressure quipment Directive and of data sheet AD2 A2 have to be observed! It is recommended to secure type-examination tested safety valves against inadmissible disassembly by means of wiring and sealing with the housing/block (bore available in the adjustment type). Characteristic curves: Counter pressure in the discharge line Notice: The system pressure increases by the counter pressure in the discharge line (port T) due to the increasing flow. (Observe the data sheet AD 2 A 2, point.3!) To ensure that this increase in system pressure caused by the flow does not exceed the value of 1% of the set response pressure, the admissible flow has to be reduced dependent on the counter pressure in the discharge line (port T) (see diagrams on pages 15 19). 1) Component series 1X according to the Pressure quipment Directive 214/8/U In principle, the valve should be operated without counter pressure in the discharge line, if possible. In case of counter pressure in the discharge line, the maximum flow possible is reduced. There is a relationship between maximum counter pressure p T in the discharge line and flow q V, which can be seen from the following characteristic curve. Characteristic curves for intermediate values of the response pressure which are not listed must be determined by means of interpolation. When the flow approaches zero, the maximum counter pressure p T is in each case 1% of the response pressure. With increasing flow, the maximum counter pressure p T decreases. Interpolation of intermediate values from the diagram 1. At the axis p T, mark 1/1 of the value of p A. 2. Determine the next lower and the next higher characteristic curve for this point. The point marked at p T divides the section between lower and higher characteristic curve on the p T axis with a certain percentage. 3. At the q Vmax axis, divide the section between next lower and next higher characteristic curve in the same percentage as the section at the p T axis. From the zerocrossing on the q Vmax axis determined in that way, draw a straight line to the value on the p T axis marked before. 4. Mark the system flow to be secured at the q Vmax axis. 5. Read off the maximum counter pressure for this value using the line at the p T axis drawn before. R 2542, edition: 21-7, Bosch Rexroth AG
1/2 DBD Pressure relief valve Characteristic curves: Counter pressure in the discharge line size Diagram for determining the maximum counter pressure p T in the discharge line at port T of the valve dependent on the flow q Vmax for valves DBD....1X/... with different response pressures p A. p A [bar] 4 3 2 1 31,5 22,5 21 17 11,5 11 1% 3 p T [bar] 4 3 8 7 2 5 4 1 x% 5 2 3 I 1 5 1 14 2 x% 27 3 4 52 1% II Characteristic curves q Vmax [l/min] Response pressure p A in bar [psi] 1 3 [435] 2 [87] 3 11 [1595] 4 115 [18] 5 17 [245] 21 [34] 7 315 [458] 8 4 [58] Characteristic curves for intermediate values can be generated by interpolation. Further explanations can be found on page 15. p A Response pressure in bar p T Maximum counter pressure in the discharge line (port T) in bar q Vmax Maximum flow in l/min I Interpolation area I, for valves with p A = 3 11 bar and q Vmax = 14 27 l/min II Interpolation area II, for valves with p A = 115 4 bar and q Vmax = 52 l/min Determination of the maximum counter pressure xample 1 (with already existing characteristic curve): Flow of the system / accumulator to be secured: q Vmax = 15 l/min Safety valve set to: p A = 315 bar. Read off the maximum counter pressure p T of approx. 22,5 bar from the diagram (see arrows, characteristic curve 7). xample 2 (with interpolated characteristic curve): Flow of the system / accumulator to be secured: q Vmax = 15 l/min Safety valve set to: p A = 8 bar. Value to be marked at the axis referred to as p T : 1/1 x 8 bar = 8 bar. Read off the maximum counter pressure p T of approx. 3 bar from the diagram (see arrows, dashed characteristic curve). Bosch Rexroth AG, R 2542, edition: 21-7
Pressure relief valve DBD 17/2 Characteristic curves: Counter pressure in the discharge line size 1 Diagram for determining the maximum admissible counter pressure p T in the discharge line at port T of the valve dependent on the flow q Vmax for valves DBDH 1...1X/... with different response pressures p A. p A [bar] p T [bar] 5 4 3 3 4,5 31,5 5 4 3 9 1 8 Characteristic curves Response pressure p A in bar [psi] 1 3 [435] 2 [87] 3 11 [1595] 4 17 [245] 5 175 [2538] 21 [34] 7 315 [458] 8 4 [58] 9 45 [5874] 1 3 [915] Characteristic curves for intermediate values can be generated by interpolation. Further explanations can be found on page 15. 2 22,5 21 11,5 17 2 7 1 11 3 1 5 3 5 2 1 1 3 29 4 5 7 1 14 42 54 5 q Vmax [l/min] p A Response pressure in bar p T Maximum counter pressure in the discharge line (port T) in bar q Vmax Maximum flow in l/min Interpolation areas R 2542, edition: 21-7, Bosch Rexroth AG
18/2 DBD Pressure relief valve Characteristic curves: Counter pressure in the discharge line size 2 Diagram for determining the maximum admissible counter pressure p T in the discharge line at port T of the valve dependent on the flow q Vmax for valves DBDH 2...1X/... with different response pressures p A. p A [bar] 4 p T [bar] 4 3 32 31,5 3 8 2 1 21 17 11 3 2 1 5 4 2 3 5 7 1 1 5 1 15 48 9 97 122 135 15 q Vmax [l/min] p A Response pressure in bar p T Maximum counter pressure in the discharge line (port T) in bar Maximum flow in l/min q Vmax Characteristic curves Response pressure p A in bar [psi] 1 3 [435] 2 [87] 3 11 [1595] 4 17 [245] 5 21 [34] 315 [458] 7 32 [441] 8 4 [58] Characteristic curves for intermediate values can be generated by interpolation. Further explanations can be found on page 15. Bosch Rexroth AG, R 2542, edition: 21-7
Pressure relief valve DBD 19/2 Characteristic curves: Counter pressure in the discharge line size 3 Diagram for determining the maximum admissible counter pressure p T in the discharge line at port T of the valve dependent on the flow q Vmax for valves DBDH 3...1X/... with different response pressures p A. p A [bar] 4 p T [bar] 4 3 31,5 3 2 21 2 17 5 1 11 3 1 5 4 3 2 1 2 1 2 3 81 121 17 213 24 q Vmax [l/min] p A Response pressure in bar p T Maximum counter pressure in the discharge line (port T) in bar Maximum flow in l/min q Vmax Characteristic curves Response pressure p A in bar [psi] 1 3 [435] 2 [87] 3 11 [1595] 4 17 [245] 5 21 [34] 315 [458] Characteristic curves for intermediate values can be generated by interpolation. Further explanations can be found on page 15. R 2542, edition: 21-7, Bosch Rexroth AG
2/2 DBD Pressure relief valve Further information Safety equipment against excessive pressure safety valves Data sheet AD 2 A 2 Subplates Data sheet 451 Hydraulic fluids on mineral oil basis Data sheet 922 nvironmentally compatible hydraulic fluids Data sheet 9221 Flame-resistant, water-free hydraulic fluids Data sheet 9222 Flame-resistant hydraulic fluids - containing water (HFA, HFAS, HFB, HFC) Data sheet 9223 Reliability characteristics according to N ISO 13849 Data sheet 812 Hydraulic valves for industrial applications Operating instructions 7-B Selection of the filters www.boschrexroth.com/filter Bosch Rexroth AG Hydraulics Zum isengießer 1 9781 Lohr am Main, Germany Telephone +49 () 93 52 / 18- documentation@boschrexroth.de www.boschrexroth.de This document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth AG. It may not be reproduced or given to third parties without its consent. The data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. The information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging. Bosch Rexroth AG, R 2542, edition: 21-7