Single Decoction vs Twice Decoction Explained

The Operational Difference Between Single and Twice Decoction

In TCM hospital pharmacies and clinics, single decoction processes raw herbs through one heating cycle before dispensing or packing. Automatic twice decoction machines run a secondary boiling cycle on the same herb residue.

Running a second cycle extracts remaining active herbal ingredients according to TCM theory, but it lengthens the processing window for each prescription. Understanding whether your dispensary requires a second extraction determines whether standard normal-pressure units or automatic twice decoction units fit your workflow.

• Single decoction completes extraction in one heating run to keep prescription turnaround moving
• Twice decoction performs a second boil on the boiled dregs to maximize herbal extraction
• Dispensary session windows determine whether you can allocate time for a secondary cycle

Assessing Cycle Time Against Prescriptions Per Session

Dispensary throughput is governed by the length of the morning or afternoon dispensing window. If outpatients wait on site for liquid pouches, a single extraction cycle delivers faster turnaround.

Where clinics prepare formulas for inpatient wards or next-day pickup, running automatic twice decoction machines makes operational sense. Single-run machines like the three-pot HCK2000 process 2 to 15 pairs per 20,000 ml pot under normal pressure, using automated high and low fire controls to manage extraction efficiency.

• Use single decoction when outpatient waiting time restricts overall cycle duration
• Choose automatic twice decoction when preparing inpatient batches or advance orders
• High and low fire switching helps manage extraction without operator intervention

Automatic Twice Herb Decoction Machine HYLA42X is the model most often specified when this is the constraint.

Matching Machine Architecture to Extraction Method

Huayan manufactures normal-pressure herb decoction and packing machines, micro-pressure units, airtight extractors, and automatic twice decoction machines. Normal-pressure units like the HCK2000 series combine boiling and hermetic pouch packaging on a single 1400 mm wide frame.

Micro-pressure machines such as the HVA2000 series raise internal pressure to alter extraction dynamics. Automatic twice decoction units are engineered to carry out the second decoction phase automatically, preventing operators from manually handling scalding decoction pots between boils.

• Normal-pressure units offer straightforward operation and automated caloric heating control
• Micro-pressure models adjust boiling pressure for clinic and hospital decoction rooms
• Automatic twice decoction models eliminate manual pot transfers between extraction cycles

Integrated Pouch Packing for Single and Double Batches

Once decoction completes, the extracted herbal liquid must be transferred into sealed containers or pouches. Combined machines like the HCK2000 transfer liquid directly from the glass pots to an integrated heat-sealing packaging mechanism.

The packing system fills pouches from 50 to 250 ml at speeds up to 8 pouches per minute, using hermetic heat-sealing film under computerized control. A clean warning sound alerts operators as the cycle transitions from decoction to packing.

• Integrated packing seals liquid pouches directly from 20,000 ml glass pots
• Pouch dimensions adjust between 95 and 180 mm in length at 100 mm width
• Computerized temperature control maintains sealing roller heat between 100 and 199 C

Dispensary Utility Requirements and Consumables Planning

Power specifications must be verified prior to equipment installation. A three-pot normal-pressure unit draws 1800 W per pot for decoction and 800 W for heat sealing, totaling 6,300 W on a standard 220 V supply.

Non-woven raw herb bags and herb liquid packing film should be stocked alongside machine wear parts. Huayan includes wear parts with every export shipment to ensure clinic operations continue without interruption.

• Total electrical load reaches 6,300 W on standard 220 V line for three-pot configurations
• Custom voltage options are available upon inquiry prior to factory manufacturing
• Wear parts ship inside the crate and replacement components ship at cost post-warranty