Bladder accumulator

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Design and function

The bladder accumulator consists of a seamless, high strength steel pressure vessel. An elastomeric bladder assembled inside the vessel ensures that the vessel is divided into gas and fluid compartments. The bladder is filled with nitrogen up to the pre-set gas pressure p₀ using the gas filler valve. If the fluid is pressed into the accumulator, the gas in the bladder is compressed, thereby increasing its pressure. The volume of gas is reduced and the fluid can flow into the accumulator on the fluid side. As soon as the pressure on the fluid side falls below that of the gas pressure, the fluid empties from the accumulator. The base valve on the fluid side prevents the bladder from being destroyed when the accumulator is almost full of gas.

Designation – Example of order

1: Type of accumulator BS bladder accumulator

2: Nominal volume (litres)

3: Max. permissible operating pressure

4: Bladder materials E - ECO (Hydrin) -32°C to +115°C NT - TT NBR (low temperature) -28°C to +070°C N - NBR -15°C to +100°C B - ITR (Butyl) -15°C to +120°C V - FKM (Viton) -20°C to +140°C

5: Fluid suply 0 - G 1/2" 1 - G 3/4" 2 - G 1 1/4" 3 - G 2" 4 - M30 x 1,5" 5 - M40 x 1,5" 6 - M50 x 1,5" 7 - VF flange inlet

6: Accumulator material A - C steel, primed B - C steel, interior coated with plastic C- C steel, interior chemnically nickel plated T - low temperature steel R - stainless steel (e. g. 1.4571)

7: Fluid supply-material A - C steel T - low temperature steel C- stainless steel (e. g. 1.4301) F - stainless steel (e. g. 1.4571)

8: Gas precharge pressure p0 (bar) at 20 °C

9: Acceptance test codes CE Directive 2014/68/EU

other on request

Dimensions bladder accumulator

Typ BLADDER ACCUMULATOR	gas vol. Vo (l)	MWP P (bar)	weight in kg	Q max (l/min)	A mm	B mm	C mm	ØD mm	Ød mm	E mm	F Zoll	ØG mm	ØH mm	SW 1 mm	SW 2 mm	J mm
BS 0,2-350/...	0,17	350	1,7	150	265	39	26	56	16	200	G ½	27	38	24
BS 0,5-350/...	0,60	350	2,5	240	248	52	22	90	16	174	G ¾	36	50	32
BS 1,0-350/...	1,00	350	5,0	240	312	52	57	114	22	203	G ¾	36	50	32
BS 1,6-350/...	1,60	350	7,0	240	395	52	27	114	16	316	G ¾	36	50	32
BS 2,5-350/...	2,40	350	10,0	450	532	66	57	114	22	409	G 1¼	53	67	50
BS 4,0-350/...	3,70	350	16,0	450	407	66	57	168	22	284	G 1¼	53	67	50
BS 5,0-350/...	5,00	350	17,0	450	881	66	57	114	22	785	G 1¼	53	67	50
BS 6,0-350/...	6,00	350	20,8	450	550	66	57	168	22	427	G 1¼	53	67	50
BS 10-350/...-L	10,00	350	28,0	450	807	66	57	168	22	684	G 1¼	53	67	50
BS 10-330/...-K	9,20	330	32,0	900	565	101	57	221	22	407	G 2	76	101	71	19	48
BS 12-330/...	11,20	330	35,0	900	664	101	57	221	22	506	G 2	76	101	71	19	48
BS 20-330/...	18,10	330	53,0	900	874	101	57	221	22	716	G 2	76	101	71	19	48
BS 24-330/...	22,50	330	61,0	900	1016	101	57	221	22	858	G 2	76	101	71	19	48
BS 32-330/...	33,40	330	85,0	900	1400	101	57	221	22	1242	G 2	76	101	71	19	48
BS 50-330/...	48,70	330	123,0	900	1927	101	66	221	50	1760	G 2	76	101	71	19	48

manufactoring tolerances are not considered

Characteristics

Installation position: Preferably vertically (liquid connection downwards) to horizontal, depending upon application. For the assembly of the filling and testing set an area of 200 mm is to be released above the accumulator.
Attachment: The accumulators are to be fastened according to size and weight. For the safe attachment we recommend HST-fastening parts, how clamps and bracket.
Allowable operating temperatur: -15 °C bis +100°C
Charging gas: Use nitrogen only.
Oxygen or compressed air means danger of explosion!
Fluids: Hydraulic oil, other fluids on request.