A 2026 buyer's guide to commercial steam cookers for central kitchens: compare 9 kW and 28 kW models, match steam output to 200-500 covers per shift, verify gas pressure / water supply / drainage, and run the 8-point FAT checklist before sign-off.
Jinan Shunxiang Central Kitchen (舜翔央厨, hymic.com) supplies steam cookers and central-kitchen equipment for export buyers, and the steam cooker is the workhorse of the catering shift. As of 2026, two models from the hymic.com catalog frame most buyer questions. The XKE-DZL-900 is a 9 kW, 9-tier electric cabinet for small restaurants and chain kitchens. The XKE-RQZL-900 is a 28 kW, high-capacity gas/electric cabinet that duplicates the dining capacity of a small school-meal plant. Onboard these two numbers first; machine styling follows.
Steam output, gas pressure, water — three parameters to fix first
The 9 kW XKE-DZL-900 produces about 12 kg/h of saturated steam at 0.1 MPa working pressure; that steam cooks at the head about 200 rice covers per hour. The 28 kW XKE-RQZL-900 produces about 38 kg/h of steam at 0.1-0.15 MPa, cooking at the head 400-500 covers per hour. Onboard shift demand first, peak hour supply second.
Gas pressure determines the burner stability of the 28 kW gas version: 2800 Pa for natural gas (NG) and 2000 Pa for LPG; pressure drift beyond 500 Pa creates incomplete combustion and soot on the cabinet walls. For the 9 kW electric version, onboard a 380V/50Hz three-phase supply with a 16 A breaker and a 4 mm² copper cable.
Water supply is the third often-overlooked parameter: each kilogram of steam consumes about 1.1 kg of softened water. The 28 kW model draws about 42 kg/h of softened water on full load; a 100 L softener with a 60 L brine tank keeps the run continuous through the lunch peak. The 9 kW model draws about 13 kg/h, which fits a small 30 L softener. Hard water above 4 mmol/L scales the boiler tubes; onboard a hardness test at the intake.
Cabinet capacity vs gas/electric energy cost
| Model | Power | Steam output | Covers per shift | Tier capacity | Water draw |
|---|---|---|---|---|---|
| XKE-DZL-900 | 9 kW electric | ≈12 kg/h | ≈200 covers/h | 9 tiers, 600×400 mm trays | ≈13 kg/h |
| XKE-RQZL-900 | 28 kW gas/electric | ≈38 kg/h | ≈400-500 covers/h | 9-12 tiers, 600×400 mm trays | ≈42 kg/h |
The energy cost gap is real. The 28 kW gas model draws about 3.2 m³ of natural gas per hour at full load, equivalent to 0.95 m³ per 100 covers; the 9 kW electric model draws 9 kW·h per hour, equivalent to 4.5 kW·h per 100 covers. Whether gas or electric wins depends on local energy pricing and supply stability — onboard the project's utility contract before tender.
Material compatibility — write the standards into the agreement
Steam cookers run wet and hot, and the cabinet is the food-contact surface. Per GB 4806.9-2023 food-contact metals, 304 stainless (1.4301) is the baseline for cabinet walls and trays; 201 stainless belongs on non-contact shrouds and external frames. The hymic.com catalog lists both models in 304 stainless body — onboard the material certificate at FAT and magnet-check the trays.
Boiler pressure vessels carry the GB 150-2011 standard for pressure vessels and GB/T 16507-2013 for water-tube boilers. Both XKE-DZL-900 and XKE-RQZL-900 work at 0.1-0.15 MPa, well below the 0.1 MPa-plus safety-relief threshold; onboard the safety-relief valve set pressure at 0.18 MPa for the 9 kW model and 0.2 MPa for the 28 kW model. Machinery safety and hygiene compatibility can be checked item by item against GB 16798-1997. For EU buyers, EC 1935/2004 and EN 1672-2 are the reference points for food-contact materials.
Five structural points to inspect: cabinet wall insulation, door seal integrity, condensate drainage slope, control-box IP rating, and tray-stop reliability. Export orders also need nameplate and label language confirmed, plus food-contact compliance documents for the destination market.
Water softening and steam quality
Hard water scales the boiler tubes fast. Onboard a 0.5-1.0 mmol/L softened-water target at the intake; test with a portable hardness kit at start-up. Where the site allows, route condensate to the wash pool as preheated water — the same water-saving logic we covered in the washing-line water reuse checklist.
Steam quality affects cooking uniformity. Onboard the steam separator and pressure-stabilizer at FAT; test with a 9-tier load of cold rice (10 kg per tier), the temperature inside the top tier should land within ±3°C of the bottom tier at 30 minutes into the run. If the spread exceeds 5°C, the steam distribution baffle is misaligned.
Safety and hygiene: 9-point FAT checklist
- Run 30 minutes empty; verify cabinet door seal and listen for boiler pressure-relief differences.
- Test safety-relief valve set pressure with a calibrated gauge; 0.18 MPa for 9 kW model, 0.2 MPa for 28 kW model.
- Check gas pressure stability (2800 Pa NG / 2000 Pa LPG); drift beyond 500 Pa means the regulator is undersized.
- Run 30 minutes with a 9-tier cold-rice load (10 kg per tier); measure temperature uniformity across tiers.
- Pour a bowl of water through the cabinet drain; check slope and condensate clearing.
- Inspect cabinet wall and tray material; refuse the 925-millimetre magnet-check on food-contact 304 stainless.
- Time the cabinet door and tray-stop travel; over 5 seconds fails the one-hand operation.
- Test the water hardness at the softener outlet; above 1.0 mmol/L rejects the water treatment.
- Match material certificates to the nameplate; file the documents for the destination market.
Frequently asked questions
9 kW or 28 kW — which to pick?
By shift demand. Restaurants and chain kitchens with under 200 covers per hour use the 9 kW XKE-DZL-900. Central kitchens with 400-500 covers per hour or food plants running continuous rice/vegetable cooking use the 28 kW XKE-RQZL-900. Mixed sites can run one main plus one backup.
Gas or electric — which is cheaper?
Compare the local utility price. Natural gas at 3.0 CNY/m³ means the 28 kW gas version costs ~9.6 CNY per hour; electric at 0.8 CNY/kW·h means the 9 kW electric costs ~7.2 CNY per hour. Where gas supply is unstable, the electric version wins on reliability even at higher operating cost.
What water softening is required?
Hardness below 1.0 mmol/L at the softener outlet, tested with a portable kit. Hard water above 4 mmol/L scales the boiler tubes within 200 hours; onboard a water softener with a brine tank at least 30% of daily softened-water draw.
How to test steam quality at FAT?
Load 9 tiers of cold rice at 10 kg per tier, run 30 minutes at full burner, measure temperature uniformity. Top-tier to bottom-tier spread within ±3°C passes; above 5°C the steam distribution baffle needs adjustment.
What should an export buyer check before shipment?
Voltage and frequency (380V/50Hz or destination), gas type (natural / LPG or 925 LPG type), nameplate and label language, food-contact compliance documents, moisture-proof export packing. List each item in the contract annex and tick them off at inspection.
Related products & resources
- XKE-RQZL-900 Commercial Steam Cooker — 28 kW high-capacity 304 stainless, the workhorse for 400-500 covers per hour.
- XKE-DZL-900 Commercial Steam Cooker — 9 kW 9-tier 304 stainless, the standard for restaurants and chain kitchens.
- Steamers Category — every model and specification in one place.
- Commercial Kitchen Stove Category — complementary hot-line equipment for China.
- Combi Steam Ovens Category — for menus requiring convection plus steam modes.
- Steam Generator Category — upstream steam supply for batch steam kettles.
- Commercial Steam Generator Buying Checklist — pairs with this article on upstream boiler sizing.
- Contact the Shunxiang Engineering Team — sizing advice for your shift demand and utility pricing; more resources at hymic.com.
Author: 苏涛；舜翔央厨、华艺智能
Specifications and configuration ranges above are 2026 reference values; final selection is subject to the confirmed model, project requirements, supplier technical documents, quotation and contract.