Wolf VCI 250 and VCI 350 Servo Vertical Bagging Machines

VCI 250 and VCI 350 at a glance

The VCI 250 and VCI 350 are servo-driven vertical baggers from Wolf Hangzhou. Filling starts after each bag bottom is sealed, and the bagger communicates with the feeding machine mounted above it. Wolf lists four feeder choices: volumetric cups, an auger, a multihead weigher and a metering pump. That range lets one bagger platform handle free-flowing granules, powders, weighed pieces or pumped products, depending on the feeder fitted. Wolf's two product pages describe both models in nearly the same words and give no size table for either. [1][2]

The frozen-food VCI350

ProPak China's 2026 exhibitor feature, on page 100, shows a VCI350 customized for frozen food. It lists stainless construction, an IP64 rating, impulse sealing, film width up to 720 mm and packages up to 5 kg, with frozen chicken pieces among the examples. [3]

These figures belong to that customized build. Ask Wolf whether the standard VCI350 and the VCI250 share them, and request drawings and documents for the exact variant you are offered. Film width and finished-bag width are different measurements. The feature gives no speed and no test conditions.

The fill sequence

Wolf's key technical point is timing. The bagger seals the bag bottom, then signals the upper feeder to discharge. Wolf offers volumetric cups, an auger, a multihead weigher or a metering pump in that upper position, so the feeder is chosen per product rather than fixed. [1][2] If you pick the weigher, compare the VCI with Wolf's EPS Twin, which comes with a weigher and metal detector already built into one system.

What matters for a buyer is whether the chosen feeder, its discharge time and the bag cycle work together on your product. A feeder can dose well on the bench while product in the combined machine still drifts into the sealing area. Ask Wolf to describe the full cycle and the conditions that allow or block discharge. Request the communication protocol, interlock logic and fault recovery for your configuration, since the product pages leave them out.

Choosing a feeder

Swipe or scroll the table to compare all columns.

A feeder appearing in Wolf's list tells you it can be supplied. Suitability for your food, chemical or liquid comes from a trial and the application documents for that product.

Getting comparable quotes for the two models

Ask for a side-by-side VCI 250 and VCI 350 proposal built on one bag drawing, one film and one fill quantity. For each model, request the size range, included tooling, film limits, control setup, utilities, footprint and trial output. If Wolf names no meaningful difference, the two quotes are the same machine under two names until it does.

Price against accepted production. Agree whether the trial includes feeder refills, film reel changes, rejects and short stops. Wolf's pages publish no rate, so the output figure has to come from the proposal.

Startup and stoppage tests

Because filling waits for the bottom seal, commissioning needs more than a steady run. Ask Wolf to show startup, a break in product supply and a controlled restart. Your team should be able to tell which bags hold a full dose and how part-filled bags are removed. Ask Wolf to state what recovery function is included.

Run seal trials on your production film and material. Record the settings and inspect finished bags by the method you agreed. If powder or small pieces can reach the seal zone, test under those conditions instead of on clean empty film. Ask whether dust extraction is offered and what seal result Wolf will commit to.

Changeover and purchase checklist

Frequently asked questions

Sources and verification

[1] Wolf VCI 250 product page
Feeder options and the fill sequence. Read 11 October 2026.

[2] Wolf VCI 350 product page
Same functional description; no model figures in the text.

[3] ProPak China 2026 exhibitor feature
Page 100 covers a customized frozen-food VCI350. Read 11 October 2026.