Hydraulic 4B-WD BSP Male Captive Seal Plug

The design of this Hydraulic 4B-WD BSP Male Captive Seal Plug is intended to ensure that the hydraulic system maintains good sealing performance under high pressure, preventing pressure drop, equipment damage or shutdown due to interface leakage.

（1）Sealing method: Utilize the integrated "gasket seal" with BSPP parallel external threads and "Captive Seal" (anti-detachment) technology. A compression of an O-ring or an ED sealing gasket between the end face of the plug and the interface plane creates a seal, without the need for additional tape or sealant.

（2）Suitable for high pressure：The Hydraulic 4B-WD BSP Male Captive Seal Plug can meet the demands of numerous industries such as petrochemicals and construction machinery.

（3）Material reliability: Made of sturdy steel, stainless steel or brass, and featuring strong anti-corrosion capabilities such as galvanization and nickel plating, it can adapt to various harsh working conditions.

Application fields

With its reliable performance, this Hydraulic 4B-WD BSP Male Captive Seal Plug is used in hydraulic or fluid systems in multiple industries:

（1）Engineering and Construction Machinery: Sealing of backup ports in the hydraulic systems of excavators, loaders, and cranes

（2）Industrial and Manufacturing Equipment: Pressure test points for hydraulic pipelines of injection molding machines, machine tools, press machines, and metallurgical equipment sealing

（3）Agriculture and Environmental Machinery: Sealing of backup ports in the hydraulic systems of tractors, harvesters, and other equipment

（4）Oil and Energy Industry: Sealing of high-pressure pipeline interface joints in oil fields, mines, and refining and processing equipment

（5）Transportation and Logistics: Sealing of hydraulic system interfaces of various mobile equipment such as trucks, buses, ships, and forklifts

Frequently Asked Questions

（1）During the process of installing the Hydraulic 4B-WD BSP Male Captive Seal Plug, do I need to use string tape or sealant?

No need. The sealing of the 4B-WD plug is entirely dependent on the anti-detachment O-ring integrated at the end face.

（2）Are there any ISO 9001 or other certifications?

Yes, our factory has obtained the ISO 9001:2015 quality management system certification.

（3）Do you accept OEM or custom brand logos?

Yes. We support imprinting the customer's logo, specifications, pressure grade, etc. on the head, and also accept non-standard threads or custom lengths.