FAQ
Frequently Asked Questions
MOQ, lead times, materials, testing, payment terms, shipping and documentation — answered the way we answer them in a quotation email.
General
What products does Lianyungang Huaneng Power Auxiliary Equipment manufacture?
We manufacture power plant dampers (flue gas, desulfurization, high-temperature baffle doors), slide gate valves, blind flange valves, rotary film and sponge iron deaerators, venting silencers, automatic dosing devices, steam-water sampling devices and sampling coolers, coal powder samplers, condensate recovery units, coarse and fine powder separators, and plate / shell-and-tube heat exchangers.
Which certifications does your factory hold?
We are certified to ISO 9001:2015 (quality), ISO 14001:2015 (environmental) and ISO 45001:2018 (occupational health and safety) management systems. We are also a qualified supplier of Sinopec, PetroChina, China Guodian Corporation, China Datang Corporation, CNOOC and Aluminum Corporation of China Limited.
Can you match a damper or valve to our existing ductwork?
Yes — most of our business is retrofit supply. Send us the duct cross-section, design temperature and media, or drawings, templates and photos of the existing installation. Our engineers will dimension the unit, its flange drilling and the actuator interface to bolt directly into your plant.
What leakage performance do your dampers achieve?
Louver-type double-layer dampers with sealing air achieve a leakage rate below 0.5%; fully sealed slide gates and coal mill isolation doors achieve zero internal and external leakage. Every damper is leakage-tested in the works before shipment and a factory acceptance test report is supplied.
How quickly can you quote and deliver?
We return an itemized quotation within 24 working hours of receiving your technical data. Standard units ship in 15–25 working days after drawing approval; custom-engineered equipment typically needs 20–35 days including factory testing.
How is dissolved oxygen controlled by your deaerators?
Our spray-tray rotary film deaerators use thermal deoxygenation for boiler feedwater at 2–220 t/h capacity; sponge iron deaerators use a porous reactive media for chemical deoxygenation, achieving dissolved oxygen below 0.03 mg/L — protecting feedwater piping and boilers from oxygen corrosion.
Do you export, and how is equipment packed?
Yes, we export worldwide. Equipment is packed in seaworthy wooden cases with rust-proofing and desiccant; sea freight is typical with full export documentation and certificate of origin. Urgent shutdown spares can be air-freighted.
What information do you need for a quotation?
For dampers and gates: duct dimensions, media, design temperature and pressure, and actuation preference. For deaerators: capacity in t/h and feedwater parameters. For silencers: venting flow, pressure and temperature. Photos of the installation help us match interfaces quickly.
Can you support installation and commissioning?
Yes. We provide installation guidance documents with every delivery and can dispatch engineers for on-site supervision and commissioning, including sealing-air system set-up, actuator commissioning and DCS signal integration.
Do you supply spare parts for existing installations?
We supply replacement gate plates, sealing strips, bearings, actuator parts, deaerator internals, sponge iron media, silencer absorptive elements and heat exchanger coils — dimensioned from your existing unit even when it was made by another manufacturer.