A multi-gas zone valve box is ordered one gas path at a time. The box number, the gas service, the label text, the pipe size and the port direction all belong to a single line in the purchase schedule. When those lines are complete and match the approved drawing, the supplier can read the requirement without guessing. This article sets out how to build that schedule for a GVB-type box and which points to confirm with the supplier before release.

Start from the drawing, then number the boxes

The approved mechanical drawing defines how many zone valve boxes the project needs and where each one sits. Give every box a unique identifier that the site team already uses, for example a floor and riser reference. The same identifier should appear on the schedule, on the box label and on the delivery documents. Contractors who invent a second numbering system for the purchase order create a matching problem at goods-in.

For each box, list the gas services it contains. A box may carry several medical gases, and the count comes from the design file. The schedule should show the number of gas paths per box so the supplier can confirm the configuration against the catalog entry.

One line per gas path

The working unit of the order is the gas path. Build a table with one row per path per box, and keep the columns to what the supplier needs to quote and build.

Pipe size and gas service are design decisions made by the qualified project team. The schedule records them; it does not set them. Where the drawing shows a size that the supplier's standard configuration may not cover, that is a question for the supplier before the order is placed.

Labels and the gas-to-position map

Label text should be copied exactly from the drawing, including language and abbreviation style used on site. A box with four gases needs four labels, and each label must sit against the correct path. Ask the supplier how the label-to-position relationship is confirmed at build stage, and whether the proposed label wording can be reproduced as written.

A simple position map helps. For each box, note the order of paths as seen from the front, and attach it to the schedule. This gives the supplier and the site team a shared reference when the box arrives.

Inlet and outlet direction

The drawing shows how supply and discharge pipework approaches each box. Record the direction for each path, and note any box where the approach differs from the others. Port orientation affects how the box fits the wall and how the pipework connects, so record it in the schedule before order approval.

Questions worth putting to the supplier at this stage:

• Which port orientations are available for the requested gas count?

• Can the orientation be set per path within one box, or is it fixed for the whole box?

• What drawing information does the supplier need to confirm orientation before production?

Box numbering and delivery marks

Delivery marks should repeat the box ID and the destination floor or area. Matching identifiers help the receiving team locate each box against the schedule; the project still needs its agreed incoming inspection. Confirm with the supplier how box IDs and labels are marked on the carton and on the unit.

Questions to close before release

A short list of confirmations keeps the order clean:

• Does the supplier's quoted configuration match the number of gas paths per box in the schedule?

• Are the label texts reproduced exactly as written?

• Is the port orientation confirmed against the drawing for every path?

• Are box IDs and delivery marks agreed in writing?

• Which document does the supplier return for approval before production?

Answers to these points belong in the order record. The qualified project team remains responsible for the technical requirements, and the supplier confirms what the proposed configuration can provide.

Multi-Gas Valve Box Enquiries

We are Kersai Medical, based in Qingdao, China, and we supply medical gas zone valve boxes through our catalog. If you can share the box numbers, the gas path requirements and the approved drawing, we will review the configuration with you. Start with the GVB-3 zone valve box pageor read our zone valve box selection notes, then contact us with your schedule.