In the hydraulic system of the industrial field, the accumulator NXQ-AB-40/31.5-L-E plays a vital role. It is like an energy “saving tank” that stores and releases hydraulic energy to ensure the stable operation of the system. The reasonable selection and matching of its accessories determine whether the accumulator can work efficiently and permanently. This article will explore in depth the types of accessories of the accumulator and the scientific selection methods.

I. Types of accessories of accumulator NXQ-AB-40/31.5-L-E

Bladder (capsule):

This is the most critical accessory of the bladder accumulator. The inner cavity of the accumulator NXQ-AB-40/31.5-L-E is divided into two parts by the bladder, with nitrogen inside the bladder and hydraulic oil outside the bladder. The bladder is usually made of rubber, such as common nitrile rubber (NBR), butyl rubber (IIR), chloroprene rubber (CR), fluororubber (FPM), etc. It is retractable. When the hydraulic pump presses the hydraulic oil into the accumulator, the bladder is deformed by pressure, the gas volume decreases as the pressure increases, and the hydraulic oil is gradually stored; if the hydraulic system needs hydraulic oil to work, the compressed gas in the bladder expands and discharges the hydraulic oil, so that the energy of the system is compensated. The NXQ accumulator capsule produced by Wuxi Fulide Hydraulics complies with HG2331-92 standards and ASME standards. It has the advantages of oil resistance, acid and alkali resistance, flex resistance, small deformation, high strength, etc., and can work normally within the range of -10 – +70℃.

Seals:

Seals play a key role in preventing the leakage of hydraulic oil inside the accumulator and the intrusion of external impurities such as dust. Common types of seals include O-rings, etc. Seals of different materials are suitable for different working environments and pressure requirements. For example, some rubber seals have good oil resistance and elasticity, and can maintain sealing effects within a certain pressure and temperature range; while some special synthetic seals can adapt to more severe working conditions, such as high temperature, high pressure or strong chemical corrosion environment.

Connecting pipe fittings:

Connecting pipe fittings are used to connect the accumulator with other parts of the hydraulic system, such as oil pumps, cylinders, control valves, etc. There are two common connection methods: threaded connection and flange connection. The corresponding pipe fittings include threaded joints, flanges, and matching bolts and nuts of various specifications. These connecting pipe fittings need to have sufficient strength and sealing to ensure that the hydraulic system will not leak or loosen during operation, and to ensure the reliability and stability of the system.

Shut-off valve:

The shut-off valve is an important control accessory in the accumulator system. For example, the safety shut-off valve is often used in conjunction with the accumulator and installed between the pipes connecting the accumulator and the system. It has the function of connecting and disconnecting the accumulator and the system. When the system needs to be repaired or maintained, the shut-off valve can be used to cut off the connection between the accumulator and the system to ensure safe operation. At the same time, the shut-off valve can also protect the accumulator by limiting pressure, releasing oil and unloading pressure, etc., to prevent the accumulator from being damaged by excessive system pressure.

II. Selection method of accessories for accumulator NXQ-AB-40/31.5-L-E

1. Selection based on working pressure:

The working pressure of the accumulator is one of the important bases for selecting accessories. For example, the nominal pressure of the accumulator NXQ-AB-40/31.5-L-E is 31.5MPa, so the selected bladder, seals, connecting pipes and other accessories need to be able to withstand this pressure or even higher pressure peaks. If the pressure resistance of the accessories is insufficient, safety hazards such as leakage and rupture may occur during the operation of the system, seriously affecting the normal operation of the system. For the bladder, it is necessary to select appropriate materials and specifications according to the working pressure to ensure that it can expand and contract normally under high pressure and will not rupture; the seals also need to have corresponding pressure resistance to prevent sealing failure under high pressure.

2. Selection based on working temperature:

Working temperature also has an important influence on the performance of accessories. The accumulator NXQ-AB-40/31.5-L-E can work normally within a certain temperature range, such as -10 – 70℃, but different accessories have different adaptability to temperature. For example, rubber bladders and seals may become hard and brittle at low temperatures, resulting in decreased elasticity, affecting their sealing and telescopic performance; at high temperatures, they may experience aging, deformation and other problems. Therefore, when selecting accessories, it is necessary to select suitable materials according to the actual working temperature range. For example, if working in a high temperature environment, you can choose a bladder and seal made of high-temperature resistant fluororubber; in a low temperature environment, you need to choose a rubber material with good cold resistance.

3. Consider the working medium:

The accumulator NXQ-AB-40/31.5-L-E usually uses hydraulic oil as the working medium, but different hydraulic oils have different chemical and physical properties. Some hydraulic oils may be highly corrosive, which requires the selected accessories, such as bladders, seals, etc., to have good corrosion resistance. Otherwise, the accessories may be corroded by the hydraulic oil, shortening their service life and even causing system failure. For example, bladders and seals made of nitrile rubber have good tolerance to general mineral oil-based hydraulic oil, but for some special synthetic hydraulic oils or hydraulic oils containing additives, it may be necessary to choose more suitable accessories such as fluororubber.

4. Matching system flow:

The flow size of the system will also affect the selection of accessories. If the flow of the hydraulic system is large, the caliber of the connecting pipes needs to be selected with larger specifications to ensure that the hydraulic oil can flow smoothly in the system and reduce pressure loss. At the same time, the flow capacity of control components such as stop valves also needs to meet the requirements of the system flow, otherwise it may affect the response speed and work efficiency of the system. For example, in some large hydraulic equipment, due to the large system flow, it is necessary to choose large-diameter flange connection pipes and stop valves with large flow capacity.

5. Pay attention to the quality and brand of accessories:

When choosing accessories, quality is a crucial factor. High-quality accessories can not only ensure the normal operation of the accumulator, but also extend its service life and reduce maintenance costs. Therefore, it is necessary to choose brand products with good reputation and credibility. For example, the NXQ accumulator capsule produced by Yoyik meets relevant standards and has a variety of excellent properties, making it a trustworthy choice. You can learn about the quality and brand reputation of accessories by consulting user reviews of the product, consulting industry experts, or referring to relevant product certifications.

In short, there are many types of accessories for the accumulator NXQ-AB-40/31.5-L-E, and each accessory plays an indispensable role in the system. When choosing accessories, it is necessary to comprehensively consider factors such as working pressure, temperature, medium, system flow, etc., and pay attention to the quality and brand of accessories, so as to ensure that the accumulator system operates efficiently, stably and safely, providing reliable protection for industrial production.

When looking for high-quality, reliable hydraulic accumulators and accessories, YOYIK is undoubtedly a choice worth considering. The company specializes in providing a variety of power equipment including steam turbine accessories, and has won wide acclaim for its high-quality products and services. For more information or inquiries, please contact the customer service below:

E-mail: sales@yoyik.com
Tel: +86-838-2226655
Whatsapp: +86-13618105229
Yoyik offers various types of spare parts for steam turbines, generators, boilers in power plants:
Stop valve J61Y-64V
Control valve T41H-16
One-way valve 106*32mm
Piston seals GSF 9500
accumulator charging kit nitrogen NXQA-10/31.5-L-EH
Electric stop valve J941H-40
Electric stop valve J961Y-320 25
Bellows valves WJ15F-16P DN15
Electric stop valve J961Y-P51150V
Check valve H71W-16P
IMO Oil pump KG70/KZ/7.5F4
Stop valve J61Y-100P
Electric stop valve J965Y-3500LB
Impeller TFVP 250D-OEK4
Accumulator NXQAB-40/31.5-L-A
direct acting valve 4WE6D62/EG220N9K4/V/60
“O” type Seal ring HN 7445-75.5×3.55
solenoid operated valve VQ5100-4
SERVO VALVE S22FOFA4VBLN
Stop valve J11H-25
MOOG 730-4229B
MANUAL BALL VALVE Q11F-10P DN40
Stop valve J65Y-630V
Spring Y7-11
Electric regulating valve T967Y-160
Instrument valve J21Y-250P
Electric butterfly valve HHD971X-150LB
internal gear pump price RCB-300
Polished stem gate valve Z964Y-2500SPL
Throttle valve L61Y-P55.5190V 12Cr1MoV
gate Z960Y-250