Diaphragm Accumulator

A diaphragm accumulator is a mechanical device that stores and releases energy using Boyle's Law (the compressibility of gases). Its core structure is a diaphragm made of a flexible material (usually rubber) that completely separates the liquid chamber from the gas chamber inside the container.

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Core Working Principle
The operation of a diaphragm accumulator is based on the volume change relationship between gas and liquid:
1. Energy Storage (Charging): When the pressure in the hydraulic system increases, liquid is forced into the liquid chamber of the accumulator.
The entry of liquid forces the flexible diaphragm to move towards the gas chamber, compressing the gas (usually nitrogen) on the other side of the diaphragm.
Due to the gas compression, potential energy (compression energy) is stored.
2. Energy Release (Release): When the system pressure decreases (e.g., when a hydraulic cylinder needs to move rapidly), the diaphragm is pushed back to its original shape by the internal pressure of the gas.
The elasticity of the diaphragm expands the compressed gas, pushing the liquid back into the hydraulic system to replenish the instantaneous flow demand.

Functions of Hydraulic Accumulators
An indispensable component in hydraulic and fluid technology. It has many uses in hydraulic circuits, such as:
1) saving drive power;

2) energy storage;

3) damping pressure shocks;

4) reducing pump pressure pulsation;

5) maintaining constant pressure.

All of these functions can be performed by hydraulic accumulators, thus yielding special benefits such as: increased productivity and overall efficiency, improved functionality, extended lifespan, enhanced safety, and reduced operating and maintenance costs.

Product
Description

We can design and develop according to the needs of our customers to meet the requirements of different clients.

Model Designations

1. Series Code:
Welded diaphragm accumulators

2. Construction:
A: (M28X1.5) Rechargeable
B: Completely sealed¹

3. Nominal Volume(L)

4. Allowable working pressure(Bar)

5. Shell Material:
1--Carbon steel

6. Diaphragm Material code:
1--Nitrile Butadiene Rubber (NBR)
2--Hydrogenated Nitrile Butadiene Rubber (HNBR)²
3--Isobutylene Isoprene Rubber (IIR)²
7--Epichlorohydrin Rubber (ECO)²

7. Liquid side standard connection AK or AB³

8. Nitrogen pre-charge pressure at 20°C (Bar)¹

Note:
(1) Only for bulk orders of Type A and Type B;
(2) Only for bulk orders;
(3) For non-standard connectors, please consult separately.
Welded Diaphragm accumulator use steel stamping shell, They have two types according to the gas side: Rechargeable and completely sealed.

Product Specifications

Model Code and Size

Nominal Volume (L)	Compression Ratio p₂:p₀	Series	Allowable Working Pressure (bar)	L (mm)	ΦD (mm)	Weight (kg)	Displacement	Standard fluid connection
								AK					AB
								M1 (ISO228)	ΦG (mm)	L1 (mm)	B1 (mm)	Hex SW	M2 (ISO228)	M3	L2 (mm)	B2 (mm)	Hex SW
0.075	8:01	210	210	91	65	0.7	38/95/150	G1/2	Φ29	16	18	32	Not provided	-	-	-	-
0.075	8:01	250	250	91	65	0.7	38/95/150	G1/2	Φ29	16	18	32	Not provided	-	-	-	-
0.16	8:01	210	210	96	75	0.9	38/95/150	G1/2	Φ29	16	18	32	Not provided	-	-	-	-
0.16	8:01	250	250	96	75	0.9	38/95/150	G1/2	Φ29	16	18	32	Not provided	-	-	-	-
0.25	8:01	100	100	106	80	0.8	38/95/150	G1/2	Φ29	16	18	32	Not provided	-	-	-	-
0.25	8:01	210	210	112	86.5	1.45	38/95/150	G1/2	Φ29	16	18	32	Not provided	-	-	-	-
0.25	8:01	250	250	112	86.5	1.45	38/95/150	G1/2	Φ29	16	18	32	Not provided	-	-	-	-
0.32	8:01	100	100	116.5	89	1.1	38/95/150	G1/2	Φ29	16	18	32	Not provided	-	-	-	-
0.32	8:01	210	210	121	95	1.75	38/95/150	G1/2	Φ29	16	18	32	Not provided	-	-	-	-
0.32	8:01	250	250	121	95	1.75	38/95/150	G1/2	Φ29	16	18	32	Not provided	-	-	-	-
0.35	8:01	100	100	121	89	1.15	38/95/150	G1/2	Φ29	16	18	32	Not provided	-	-	-	-
0.35	8:01	210	210	124	95	1.8	38/95/150	G1/2	Φ29	16	18	32	Not provided	-	-	-	-
0.35	8:01	250	250	124	95	1.8	38/95/150	G1/2	Φ29	16	18	32	Not provided	-	-	-	-
0.5	8:01	210	210	133	106	2.3	38/95/150	G1/2	Φ34	18	22	41	G1/2	M33X1.5	18	38	41
0.5	8:01	250	250	133	106	2.3	38/95/150	G1/2	Φ34	18	22	41	G1/2	M33X1.5	18	38	41
0.75	8:01	210	210	148.5	121	3	38/95/150	G1/2	Φ34	18	22	41	G1/2	M33X1.5	18	38	41
0.75	8:01	250	250	152	123	3.5	38/95/150	G1/2	Φ34	18	22	41	G1/2	M33X1.5	18	38	41
1	8:01	210	210	160	138	3.8	38/95/150	G1/2	Φ34	18	22	41	G1/2	M33X1.5	18	38	41
1	8:01	250	250	163	142	5	38/95/150	G1/2	Φ34	18	22	41	G1/2	M33X1.5	18	38	41
1.4	8:01	210	210	174	153	5.9	38/95/150	G1/2	Φ34	18	22	41	G1/2	M33X1.5	18	38	41
1.4	8:01	250	250	174	153	5.9	38/95/150	G1/2	Φ34	18	22	41	G1/2	M33X1.5	18	38	41
2	8:01	210	210	202	169	7.6	38/95/150	G1/2	Φ34	18	22	41	G1/2	M33X1.5	18	38	41
2	8:01	250	250	205	172	9.2	38/95/150	G1/2	Φ34	18	22	41	G1/2	M33X1.5	18	38	41
2.8	4:01	210	210	250	169	9.2	38/95/150	G3/4	Φ42	24	28	46	G3/4	M45X1.5	20	37	46
2.8	4:01	250	250	255	172	11.5	38/95/150	G3/4	Φ42	24	28	46	G3/4	M45X1.5	20	37	46
3.5	4:01	210	210	289	173	13.8	38/95/150	G3/4	Φ42	24	28	46	G3/4	M45X1.5	20	37	46
3.5	4:01	250	250	289	173	13.8	38/95/150	G3/4	Φ42	24	28	46	G3/4	M45X1.5	20	37	46

About Us

Ningbo Fenghua Jiangkou Jingyi Hydraulic Co., Ltd.

Ningbo Fenghua Jiangkou Jingyi Hydraulic Co., Ltd. is located in Xikou Town, Fenghua District, Ningbo City, Zhejiang Province. We are a national high-tech enterprise specializing in the manufacturing of hydraulic and pneumatic components. Our core products include various types of accumulators, hydraulic parts, and pneumatic components.

Founded in 2012, the company covers a workshop area of more than 5,000 square meters and has a professional team. Jingyi Hydraulic is a China OEM & ODM Small Diaphragm Accumulator Manufacturer and Pressure Vessel Accumulator Factory, we hold the Special Equipment Manufacturing License (Grade A2 for Pressure Vessels) issued by the Zhejiang Administration for Market Regulation and have obtained the EU CE certification, possessing professional manufacturing qualifications for high-pressure accumulators and access to the international market. The production system strictly complies with national quality assurance system standards to ensure reliable control of every process from raw materials to finished products.

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