Qidong

Dehaha Qidong: CPM, CPDM and modular DCO air selection

Compare stage arrangements at the same pressure, or define a scroll package by its modules and service requirements.

DEHAHA / DHH · QIDONG, NANTONG

Match the compressor arrangement to your demand

德哈哈压缩机江苏有限公司 is the Jiangsu compressor company identified by Dehaha’s site, with its operation in Qidong Economic Development Zone. The site separately lists a Shanghai company and office. Align the contracting company, actual manufacturing address and equipment documents in the offer.

The company describes industrial air-compressor development and manufacturing, including screw, oil-free and air-treatment equipment. Its historical account places a Qidong base expansion in 2004; that statement does not establish the present legal entity’s incorporation date.

Original image from the manufacturer’s production-equipment page. Historical imagery is company context, not a statement of current available production capacity.

Screw air for a plant networkCompare stage arrangement at the same pressure, then check package input and load behavior.Oil-free scroll with several modulesMatch module count, staged operation and access to the process and maintenance plan.

CPM SINGLE STAGE · CPDM TWO STAGE

The same motor rating can describe different packages

CP22M single-stage product image: a 22 kW example with 3.60 m³/min at 0.8 MPa.

CP75DM two-stage product image. Its enclosure and published duty differ from CP75M.

The CP product material has separate single-stage CPM and two-stage CPDM sheets. The single-stage description names an integrated shaft arrangement, LCD display and PID pressure control. The comparison below keeps pressure fixed instead of combining the family’s largest flow with a different pressure.

Published 75 kW selections at 0.8 MPa — compare complete operating data before calculating cost
Selection	Flow at 0.8 MPa	Enclosure / mass	Outlet
CP75M · single stage	12.80 m³/min	1750 × 1272 × 1560 mm 1120 kg	G2
CP75DM · two stage	15.5 m³/min	2100 × 1433 × 1590 mm 1700 kg	G2

Use the actual pressure column

CP22M publishes 3.70 / 3.60 / 3.20 / 2.80 m³/min at 0.7 / 0.8 / 1.0 / 1.3 MPa. Its 22 kW rating, G1 outlet, 1140 × 780 × 1210 mm enclosure and 370 kg mass belong to that specific row.

The two-stage CP75DM row gives 16.0 / 15.5 / 12.8 / 10.2 m³/min at the same four pressure columns. These are published selection points, not measured annual savings. Obtain the complete volume reference, pressure basis, actual package input and part-load/control behavior at your site’s demand.

See CPM / CPDM selected ratings and installation details →

DCO OIL-FREE SCROLL · MODULAR ENCLOSURES

Choose the module plan, not just a model number

Original manufacturer illustration of the cabinet and module arrangement. It does not identify every model row or prove a specific supplied configuration.

The detailed DCO diagram shows fixed and orbiting scroll elements compressing pockets of air toward a central discharge. Larger cabinets combine several airends with staged control.

DCO15-8 is 11 kW, not 15 kW. The model name is separate from installed motor power. All selected rows below publish their flow at 8 bar; the full volume reference and pressure basis should accompany the offered performance sheet.

DCO15-8

2 × 5.5 kW modules

Package rating: 11 kW
Flow at 8 bar: 1.30 m³/min
Cabinet: 1670 × 680 × 1698 mm
Outlet / mass: G3/4 · 360 kg

DCO20-8

5 × 3 kW modules

Package rating: 15 kW
Flow at 8 bar: 1.75 m³/min
Cabinet: 1370 × 860 × 1308 mm
Outlet / mass: G1 · 550 kg

DCO60-8

8 × 5.5 kW modules

Package rating: 44 kW
Flow at 8 bar: 5.20 m³/min
Cabinet: 1670 × 860 × 2298 mm
Outlet / mass: G1-1/2 · 700 kg

Operation during changing demand

Provide sustained and peak flow and the acceptable interruption during service. Ask how modules start/stop, share running hours and respond to an isolated module. Obtain the available package capacity under that condition; do not assume proportional certified output from module count alone.

Access and process air

Cabinet size is not module-removal or cooling clearance. Agree the installation/service drawing, ambient limit and supply. Define moisture, particles and oil at the process connection, dryer/filter scope, drains and sampling tests. Oil-free compression alone does not establish food, medical or breathing-air approval.

See DCO module configurations and installation data →

COMPANY CONTEXT · MODEL-SPECIFIC OFFER

Bring the performance sheet and the delivery scope together

The 2022 national recommended catalogue of energy-saving equipment names 德哈哈压缩机江苏有限公司 and model DHH75DM-8. It independently identifies the company and a historical listed model. It is not a current certificate for CP75DM or the full CPM and DCO ranges. Ask the manufacturer to explain differently prefixed names rather than merging their ratings.

Duty and selection
Full offered model, CPM/CPDM stage arrangement or DCO module count, pressure-matched flow with reference conditions, input power and speed/staging behavior across your load cycle.
Installation and treatment
Electrical supply, ventilation/heat rejection, service and module-removal access, piping and outlet interfaces, receiver/dryer/filter scope and process air-quality acceptance.
Delivery and continued use
Contracting company and manufacturing address, agreed inspection records, current issuer and model scope for any required certificate, drawings, manuals, wear-parts intervals and destination documents. Put commissioning and support responsibility in the offer.

Questions about these Dehaha selections

Does the 75 kW comparison prove a saving percentage?

The two published flows share a pressure column, but motor rating alone is not measured package input. Obtain the same flow/test reference, actual input and part-load results for the proposed duty before comparing operating cost.

Is a multi-module DCO package automatically redundant?

Module count establishes its arrangement, not guaranteed output during a fault or maintenance. Specify required service capacity and ask for the actual isolation, sequencing and protection behavior.

Can a historic listed DHH model certify an offered CP model?

The names differ. Obtain the manufacturer’s model relationship and current documents scoped to the actual offered machine; keep the historical listing separate.

Prepare a Dehaha enquiry

Send the chosen stage or module arrangement, pressure/flow reference, demand cycle and process air requirements.

Specify the Dehaha duty

Specification pages

Specification pages for Dehaha product types

All spec pages

Duty	Write on the RFQ
How to specify an air compressor	If the RFQ only says “compressor, China”, a plant cannot price it. Start with architecture, then the duty point, then the papers.
75 kW 8 bar rotary screw compressor	75 kW at 8 bar(g) is a common plant-air point. FAD is not a brochure range — it is the flow at that pressure, after the cooler, for the voltage you actually run.
110 kW 10 bar rotary screw compressor	10 bar(g) is not 8 bar with a different sticker. FAD falls as pressure rises. Write 110 kW and 10 bar together, then the flow you need at that point.
22 kW VSD screw compressor	22 kW VSD is a flow band, not a single nameplate FAD. The plant needs min/max flow at the working pressure, or it will quote a fixed-speed machine with an inverter sticker.

Product information

Information reviewed 2026-10-08. Specifications apply only to the models and conditions stated.

Dehaha: Compare stage arrangements at the same pressure, or define a scroll package by its modules and service requirements.

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