Import All Kinds Gas Spring — Buy in Bulk from Supplier in China

Yuyao Derun Hydraulic Fittings Co., Ltd. supplies gas springs from its base on Shunda Road, Yuyao, Ningbo, Zhejiang province, China. The source describes adjustable pressure settings and corrosion-resistant finishes, with sizing and force ratings offered in a range to suit varied applications. Gas springs function as hydro-pneumatic actuators, using nitrogen gas pressure within a sealed cylinder to provide controlled extension force. Standard construction comprises a precision-honed steel tube, ground and polished piston rod, and elastomeric dynamic seal, though buyers should confirm Derun's exact material specifications and seal compound.

The piston rod is typically hard chrome plated to 20-30 microns thickness for wear and corrosion resistance, with 304 or 316 stainless steel offered for aggressive environments. Cylinder tubes are commonly produced from seamless cold-drawn steel to EN 10305-1 or equivalent, with wall thickness selected for the maximum working pressure. Dynamic seals are generally nitrile rubber (NBR) for standard duty, with fluorocarbon (FKM) or PTFE alternatives for high-temperature or chemically exposed service. The source mentions corrosion-resistant finishes but does not specify coating type, salt-spray hours, or rod surface roughness (Ra) targets.

Applications cited include automotive hood and trunk supports, office chair height adjustment, and industrial equipment counterbalancing. Force ratings are described as variable, but no Newton range or stroke length table is provided. The source notes FOB and CIF shipping, with L/C and T/T payment, and mentions flexible MOQ without stating quantities. Buyers should request a force-extension curve, cycle life test data, and end-fitting thread specifications (typically M8, M10, or bespoke ball-joint / clevis) to ensure mechanical compatibility with their application.

Yuyao Derun Hydraulic Fittings Co., Ltd. operates from Shunda Road 285, Ningbo, Zhejiang, China, postal code 315400. The supplier is an imported-tier account with harbor trust tier classification. Response metrics show 0.00 percent response rate and zero average response hours, indicating the profile may be newly listed or inactive in platform messaging. No founding year, registered capital, employee headcount, or factory floor area is disclosed in the source material.

The firm is positioned as a hydraulic fittings and gas spring supplier in the Ningbo region, a cluster known for pneumatic and hydraulic component manufacturing. The source description does not distinguish whether Derun manufactures gas springs in-house or sources from partnered factories. There is no mention of ISO 9001, ISO/TS 16949, or other quality system certification. Buyers should conduct due diligence on production capacity, in-house testing capability (pressure cycling, burst testing, dimensional CMM), and whether OEM/ODM engineering support is available.