Hengda low-pressure semi-oil-free compressors, Nanjing Jiangning

Nanjing Hengda Compressor Co., Ltd. publishes from Chunhua industrial park, Jiangning — 118 Shenglihe Road on the official contact block. The English homepage slogan on that site is not copied here. The useful fact is architecture. The product centre that a buyer can open is titled low-pressure semi-oil-free lubrication. Semi-oil-free means the crankcase still sees lubricant while the compression side is built to keep oil off the air stream better than a splash-lubricated workshop piston. It is not a dry Class 0 oil-free screw, and it is not a CNG process frame.

Public tables on the official product pages name ZW, VW, 2-VW and 2-WW frames. Example rows a buyer can read without inventing a number: ZW-0.11/7 and ZW-0.15/7 at 0.7 MPa with 1.1 kW and 1.5 kW motors; VW-0.5/9 through 2-VW-1.6/9 at 0.9 MPa; 2-WW-1.6/9 through 2-WW-3.2/9 at 0.9 MPa with twin motors. Those strings sit inside HENGDA-LP-SEMI. This desk does not mint a catalogue SKU for each table row. HENGDA-AIR is the second published series for other industrial-air hosts the company says it builds. If the duty is not low-pressure semi-oil-free, say so in words.

The same product copy states a wider host list: pressures from 10 to 420 kgf/cm², more than forty hosts and more than one hundred machine types. That sentence is a factory claim about range, not a nameplate you can drop into a PO. A 42 MPa process piston and a 0.9 MPa workshop set do not share a packing list. Put the pressure the process actually needs on the sheet, then the flow.

Jiangning is not Wuxi and not Wenling. FOB Nanjing or Shanghai, voltage, whether the set is air- or water-cooled, and whether you need a receiver or dryer all stay on the RFQ. The homepage calls Hengda a joint venture and mentions a Jiangsu high-tech product award. Those lines do not print ISO 8573 class, CE or ASME. Missing papers stay missing.

Jiangning Chunhua is an industrial-park address, not a Nanjing downtown showroom. A buyer who wants to witness a 2-WW twin set should write the inspection hold point and whether the test is on air or on the process gas. Nameplate motor pairing on the public tables (single motors on ZW/VW, twins on 2-VW and 2-WW) is a published pattern, not a licence to invent a 55 kW frame that the table does not show.

The homepage also names company-environment and contact pages. The English export page that mirrors the product centre still titles the family “low pressure semi-oil-free lubrication.” Use that phrase on the RFQ if you want Chunhua to recognise the duty. Do not write “oil-free Class 0” because the Chinese title contains the word oil-free. Semi is the word that matters.

Spare-parts and after-sales numbers sit on the same contact block as the sales line. Use the Jiangning contact the quotation names. If you need a wearing-parts kit for a 2-WW twin set, say the frame family and the hours, and let Hengda price the kit as a separate line.

The plant remains the seller. This desk holds an English nameplate so a buyer can compare semi-oil-free piston air with a dry screw RFQ and see they are different machines. Hengda quotes. The crate leaves Chunhua.