Genuine HB-30G PU Accumulator Diaphragm for Heavy Hydraulic Breakers
The HB-30G Polyurethane (PU) Accumulator Diaphragm is a heavy-duty sealing membrane engineered for nitrogen gas accumulators in 18- to 26-ton class hydraulic rock breakers, including the Furukawa HB30G / KHB30G series and compatible heavy attachment lines.
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The HB-30G PU diaphragm is molded from high-grade thermoplastic polyurethane (PU). Compared to standard rubber diaphragms, polyurethane offers exceptional tensile strength, superior tear resistance, and high abrasion tolerance—making it ideal for medium-to-heavy class hydraulic hammers subjected to intense recoil vibrations and extreme hydraulic impulse cycles.
The SPARKLING MACHINERY NEW HB-30G PU Diaphragm Photo:

The SPARKLING Genuine HB-30G PU Accumulator Diaphragm is a high-quality replacement component designed for heavy hydraulic breakers. Manufactured from durable polyurethane (PU), it helps maintain reliable accumulator performance, stabilize hydraulic pressure, and protect the breaker system during demanding excavation, demolition, quarrying, and construction work.
--- Key Features and Benefits
- Precision fit: Designed for HB-30G hydraulic breaker accumulator applications, supporting dependable installation and sealing performance.
- Durable PU material: Offers excellent resistance to hydraulic oil, abrasion, pressure changes, and repeated operating cycles.
- Stable pressure control: Helps the accumulator absorb hydraulic pressure fluctuations and reduce shock loads transmitted through the breaker system.
- Improved equipment reliability: A properly functioning diaphragm supports consistent breaker impact performance and helps reduce unplanned downtime.
- Heavy-duty application: Suitable for excavators working in demanding environments such as rock breaking, concrete demolition, mining, and road construction.
- Cost-effective maintenance: Replacing a worn or damaged diaphragm can help restore accumulator function without replacing the complete assembly.
For best results, inspect the accumulator, charging pressure, sealing surfaces, and related components before installation. Always confirm the breaker model, diaphragm dimensions, material requirements, and application compatibility before ordering. Professional installation and correct nitrogen charging are recommended.
--- Why Choose SPARKLING?
Founded in 2013, SPARKLING MACHINERY specializes in reliable excavator parts and hydraulic components. We serve customers worldwide with products compatible with leading brands including Caterpillar, Komatsu, Hitachi, and Volvo. Through strict manufacturing and quality-control procedures, we focus on stability, precision, and long service life.
SPARKLING provides competitive pricing, technical support, customized solutions, and responsive consultation to help customers reduce maintenance costs and keep heavy equipment operating efficiently.
FAQ
What are the signs that an HB-30G accumulator diaphragm has failed?
Common symptoms include loss of hammer impact energy, severe hydraulic hose vibration on the excavator boom, rapid loss of nitrogen pressure, or nitrogen gas escaping into the excavator’s hydraulic oil reservoir.
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📦 Packing
1. Packaging methods: Carton box + Wooden case/Pallet + Anti-rust treatment
2. Export-standard packaging to ensure safety during transportation
3. Custom packaging available upon request
4. Dimensions and weight can be provided for freight calculation



🚚 Shipping
1. Available shipping methods: Sea freight, Air freight, Express delivery (DHL, UPS, FedEx, etc.)
2. LCL (Less than Container Load) and FCL (Full Container Load) options are supported
3. For Russian clients, we can introduce the forwarder agent to you
4. Delivery time: Ships within 1-3 working days after payment (for items in stock)
💳 Payment
1. Accepted methods: T/T, Bank Transfer, PayPal, Alipay, WeChat Pay, Western Union
2. Deposit + balance payment available for large or custom orders
3. Flexible payment options—feel free to contact us for details
📌 Frequently Asked Questions (FAQs)
Q: Which excavator models is this part compatible with?
A: This product is compatible with major brands such as CAT, KOMATSU, HITACHI, and more. Custom specifications are also available.
Q: How can I make sure I’m selecting the correct part?
A: You can send us a photo of the old part, part number, or your excavator model, and we will help you confirm the right match.
Q: Is there a warranty for this product?
A: Yes, we offer a 6-month quality guarantee under normal use.
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We are committed to producing the highest quality products at the most competitive prices. Therefore, we sincerely invite all interested companies to contact us for more information.


Sparkling Machinery Co.,Ltd
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Whatsapp: +8613609010879