ABZSS 20 M-3X/140E/S12V

Manufacturer: Bosch Rexroth

Material #: R901116029

Model : ABZSS 20 M-3X/140E/S12V

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth ABZSS 20 M-3X/140E/S12V (R901116029) is an advanced hydraulic accumulator shutoff block designed to offer reliable protection, isolation, and unloading functionalities for hydraulic accumulators. This critical component is engineered to comply with the specific requirements outlined in the Pressure Equipment Directive of the EU, ensuring it meets rigorous safety and performance standards. The ABZSS 20 M-3X/140E/S12V integrates seamlessly with hydraulic accumulators through a specially designed accumulator adapter, creating a secure connection that maintains system integrity under various operating conditions. Its primary function is to safeguard the accumulator from experiencing unacceptable overpressure situations. This protection is afforded by a built-in pressure relief valve that acts as a safety device to prevent potential damage or hazards. It's important to note that the pressure relief valve is not intended for any control tasks within the hydraulic system; its sole purpose is as a protective measure. To ensure optimal functioning, there must be a significant margin between the maximum operating pressure and the working pressure of the system. The avoidance of triggering the pressure relief valve during regular operations is highly recommended to maintain system stability and longevity. The model comes from component series X, which signifies its place within Bosch Rexroth's lineup of precision-engineered hydraulic components. It can handle maximum operating pressures (specified in bar) and accommodates various nominal diameters including DN6, DN10, DN15, and DN20. These features make it versatile enough to be used in a wide range of applications where hydraulic accumulators are employed. Overall, the Bosch Rexroth ABZSS 20 M-3X/140E/S12V offers robust performance for systems requiring high standards of safety and reliability in their accumulator circuits.

$1,574.00 USD

More are expected on April 21, 2025

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Status: This product is temporarily out of stock.

Qty: Delivered as early as April 21, 2025 when ordered in

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Function

The accumulator shut-off block serves for the protection, isolation and unloading of hydraulic accumulators. It is classified based on its use according to the Pressure Equipment Directive 2014/68/EU article 4, section 3. The connection between the accumulator shut-off block and the accumulator is realized by means of an accumulator adapter.

The accumulator is protected from inadmissible overpressure by means of the pressure relief valve. The pressure relief valve must not be used for any control tasks. Sufficient difference between the maximum operating pressure and the working pressure must be ensured. Response of the pressure relief valve should be prevented, if possible.

Ordering code

01	02	03	04		05		06	07		08	09	10	11	12		13	14
ABZSS				‒	3X	/		E	/						‒		*

Device designation
01	Accumulator shut-off block	ABZSS
Type of connection
02	Piping connection	no code
02	Subplate mounting	-P1)
Nominal diameter
03	DN08	08
	DN10	10
	DN20	20
	DN30	30
Unloading
04	manual	M
04	manual and electro-magnetic (without manual override)	E2)
Component series
05	Component series 30 ... 39 (30 ... 39: unchanged installation and connection dimensions)	3X
Pressure adjustment (others upon request)
06	50 bar	50
	100 bar	100
	140 bar	140
	210 bar	210
	350 bar	3503)
Pressure relief valve
07	Pressure relief valve, type-examination tested (with CE mark) 4)	E
Accumulator adapter
08	Without accumulator adapter	no code
	With BSP thread G1/2
	DN08	S104
	DN10; DN20	S30
	With BSP thread G3/4
	DN08	S108
	DN10; DN20	S31
	DN08	S105
	DN10; DN20	S10
	With BSP thread G1 1/4
	DN08	S107
	DN10; DN20	S12
	DN30	S307
	With BSP thread G2
	DN08	S109
	DN10; DN20	S13
	DN30	S309
	With SAE thread 3/4-16 UNF
	DN10; DN20	S64
	With SAE thread 1 1/18-12 UN
	DN10; DN20	S60
	With SAE thread 1 5/8-12 UN
	DN10; DN20	S62
	DN30	S620
	With SAE thread 1 7/8-12 UN
	DN10; DN20	S63
	DN30	S630
Voltage type 5)
09	Direct voltage 24 V	G24
	Alternating voltage 110 V	G968)
	Alternating voltage 230 V	G2058)
Electrical connection 5)
10	Without mating connector with protective cap	K46)
Seal material
11	FKM seals	V
11	NBR seals	W7)
Connection thread
12	BSP thread according to ISO 228 Part 1	no code
12	SAE thread to ANSI B1.1	122)
Special version
13	DN30 with DBDS valve NG30	SO30
	Shut-off device (2 positions) DN10 … DN30	103
	Shut-off device (1 position) DN10 … DN30	104
Connection thread
14	Further details in the plain text

1)	Only “DN30”
2)	Not with “DN08”
3)	Type SO30 is supplied with a pressure rating of 315 bar
4)	According to Pressure Equipment Directive 2014/68/EU
5)	Only with electro-magnetic unloading design “E”
6)	Mating connectors, separate order (data sheet 08006).
7)	Special version
8)	For connection to the AC voltage mains , a DC solenoid controlled via a rectifier is to be used (see table). For individual connection, a mating connector with integrated rectifier can be used (separate order).

Notice:

Unlike the standard accumulator safety block, the ABZSS30 … SO30 is equipped with a direct operated pressure relief valve NG30.

Version ABZSS-P30 for subplate mounting.

AC voltage mains (admissible voltage tolerance ± 10%)	Nominal voltage of the DC solenoid in case of operation with alternating voltage	Ordering code
110 V ‒ 50/60 Hz 120 -V ‒ 60 Hz	96 V	G96
230 V ‒ 50/60 Hz	205 V	G205

general

Nominal diameter			DN08	DN10	DN20	DN30	DN30SO30	DNP30…
Weight	Version "M"	kg	4	5.2	8.5	20.5	26.5	33.1
Weight	Version "E"	kg	-	5.5	8.8	20.8	26.8	33.4
Ambient temperature range		°C	-15 … +80

hydraulic

Maximum operating pressure	bar	350
Hydraulic fluid temperature range	°C	-10 … +60
Seal material		FKM seals or NBR seals (special version)
Block material		Steel
Viscosity range	mm²/s	12 … 230
Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 1)		Class 20/18/15

1)	The cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and simultaneously increases the life cycle of the components. For the selection of the filters, see www.boschrexroth.com/filter.

Hydraulic fluid		Classification	Suitable sealing materials	Standards	Data sheet
Mineral oil		HL, HLP, HLPD, HVLP, HVLPD	FKM, NBR	DIN 51524	90220
Bio-degradable	Insoluble in water	HETG	FKM, NBR	ISO 15380	90221
	Insoluble in water	HEES	FKM
	Soluble in water	HEPG	FKM

	Important information on hydraulic fluids:
	▶ For more information and data on the use of other hydraulic fluids, please refer to the data sheets above or contact us!
	▶ 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 40 K higher than the maximum solenoid surface temperature.
	▶ Bio-degradable and flame-resistant:
	When using hydraulic fluids that are simultaneously zinc-solving, zinc may accumulate (700 mg zinc per pole tube).

electrical

Protection class according to DIN EN 60529 1)	With connector "K4"	IP65

1)	With mating connector mounted and locked

For applications outside these parameters, please consult us!

Type-examination tested safety valves type DBD1)

Size 6 (ABZSS 08, 10)

Size 10 (ABZSS 20)

Size 20 (ABZSS 30, -P30)

Size 30 (ABZSS 30…SO30)

Notice:

Value pairs located in the areas of the characteristic curves with gray background cannot be realized with the safety valve. The characteristic curves shown here are only valid for a counter pressure of 0 bar in the discharge line.

1) Component series 1X, according to the Pressure Equipment Directive 2014/68/EU

Characteristic curves: Counter pressure in the discharge line

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 possible flow is reduced. There is a relationship between maximum counter pressure pT in the discharge line and flow qV, 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 pT is in each case 10% of the response pressure. With increasing flow, the maximum counter pressure pT decreases.

Interpolation of intermediate values from the diagram

At the axis pT, mark 1/10 of the value of pA. Determine the next lower and the next higher characteristic curve for this point. The point marked at pT divides the section between lower and higher characteristic curve on the pT axis with a certain percentage. At the qVmax axis, divide the section between next lower and next higher characteristic curve in the same percentage as the section at the pT axis. From the zero position flow on the qVmax axis determined in that way, draw a straight line to the value on the pT axis marked before. Mark the system flow to be secured at the qVmax axis. Read off the maximum counter pressure for this value using the line at the pT axis drawn before.

Characteristic curves: Counter pressure in the discharge line – size 6

Diagram for determining the maximum counter pressure pT in the discharge line at port T of the valve dependent on the flow qVmax for valves DBDS 6...1X/...E with different response pressures pA.

Characteristic curves	Response pressurepA in bar
1	30
2	60
3	110
4	115
5	170
6	210
7	315
8	400
Characteristic curves for intermediate values can be generated by interpolation. See "Counter pressure in the discharge line".

pA Response pressure in bar

pT Maximum counter pressure in the discharge line (port T) in bar

qVmax Maximum flow in l/min

Area I Interpolation area I, for valves with pA = 30 … 110 bar and qVmax = 14 … 27 l/min

Area II Interpolation area II, for valves with pA = 115 … 400 bar and qVmax = 52 l/min

Determination of the maximum counter pressure

Example 1 (with already existing characteristic curve): Flow of the system/accumulator that has to be secured: qVmax = 15 l/min

Safety valve set to: pA = 315 bar.

From the diagram (see arrows, characteristic curve 7), read off the maximum counter pressure pT of approx. 22.5 bar.

Example 2 (with interpolated characteristic curve):

Flow of the system / accumulator to be secured: qVmax = 15 l/min

Safety valve set to: pA = 80 bar.

The value to be marked at the pT axis is calculated as follows: 1/10 x 80 bar = 8 bar.

From the diagram (see arrows, dashed characteristic curve), read off the maximum counter pressure pT of approx. 3 bar.

Characteristic curves: Counter pressure in the discharge line – size 10

Diagram for determining the maximum counter pressure pT in the discharge line at port T of the valve dependent on the flow qVmax for valves DBDS 10...1X/...E with different response pressures pA.

Characteristic curves	Response pressurepA in bar
1	30
2	60
3	110
4	170
5	175
6	210
7	315
8	400
9	405
10	630
Characteristic curves for intermediate values can be generated by interpolation. See "Counter pressure in the discharge line".

pA Response pressure in bar

pT Maximum counter pressure in the discharge line (port T) in bar

qVmax Maximum flow in l/min

Interpolations

Characteristic curves: Counter pressure in the discharge line – size 20

Diagram for determining the maximum admissible counter pressure pT in the discharge line at port T of the valve dependent on the flow qVmax for valves DBDS 20...1X/...E with different response pressures pA.

Characteristic curves	Response pressurepA in bar
1	30
2	60
3	110
4	170
5	210
6	315
7	320
8	400
Characteristic curves for intermediate values can be generated by interpolation. See "Counter pressure in the discharge line".

pA response pressure in bar

pT Maximum counter pressure in the discharge line (port T) in bar

qVmax Maximum flow in l/min

Characteristic curves: Counter pressure in the discharge line – size 30

Diagram for determining the maximum counter pressure pT in the discharge line at port T of the valve dependent on the flow qVmax for valves DBDS 30...1X/...E with different response pressures pA.

Characteristic curves	Response pressurepA in bar
1	30
2	60
3	110
4	170
5	210
6	315
Characteristic curves for intermediate values can be generated by interpolation. See "Counter pressure in the discharge line".

pA response pressure in bar

pT Maximum counter pressure in the discharge line (port T) in bar

qVmax Maximum flow in l/min

DN08

Version "M" (manual unloading)

Version "E" (manual and electro-magnetic unloading)

DN10, 20 and 30

Version "M" (manual unloading)

1	System shut-off cock
2	Pressure relief valve
3	Manual unloading
4	Electro-magnetic unloading, optional
Connection designation
M, M1, M2	Measuring port
P, P1, P2	Pump connection
S	Accumulator port
T	Tank port

Dimensions: Version "08…" (DN08)

Dimensions in mm