Irrigation
Runte RT-9816 and RT-9821 Rain Guns
Runte lists three PP + POM rain guns for field irrigation. The RT-9816 has a G1-inch connection, works at 2.0–4.0 bar and has a listed Range of 15–17 m. The larger RT-9821 and RT-9821B have a G1½-inch connection, work at 3.0–4.5 bar and reach 22–25 m. The catalogue has three gaps to close with Runte. Flow figures are printed in litres with no time unit. The larger models are coded RT-9812 in their descriptions. The B photo shows 1-inch and 2-inch adapter pieces. Ask Runte for one model code, a nozzle performance table with units and a connection drawing before you size a pump or riser.
Ningbo Runte Irrigation Equipment ↗
Build my procurement briefThree rain guns and their codes
The RT-9816 heading and description agree. For the two larger guns the heading ends in 9821 and the description in 9812. Quote both codes in your enquiry and ask Runte to name one model on the quotation. The B version has a green and black body; the catalogue gives it the same figures as the black larger gun.
| Catalogue heading | Description and figures |
|---|---|
| RT-9816 | Description RT-9816; G1 inch; 2.0–4.0 bar; Range 15–17 m; Flow 3700–5000 L. |
| RT-9821 | Description RT-9812; G1½ inch; 3.0–4.5 bar; Range 22–25 m; Flow 11000–12500 L. |
| RT-9821B | Description RT-9812B; same connection, pressure, Range and Flow as RT-9821; green and black, shown with separate adapter pieces. |
Flow units before pump sizing
Flow is printed as 3700–5000 L and 11000–12500 L, with no time unit. A flow rate needs one: L/h, L/min or m³/h. Get the unit from Runte before you size a pump or add up the demand of several guns. Once the unit is known, our guide to choosing a petrol engine water pump shows how to set that flow against total head and suction lift.
Ask for a nozzle table that gives, for each nozzle, the flow with its unit, the pressure at the gun inlet and the throw. The minimum and maximum catalogue figures are separate limits, so read each operating point from that table.
With that table, your designer can check how many guns run at once, the elevation and the pipe losses against the duty you choose. Lay-flat and suction hose for the feed line are covered in our guide to specifying irrigation hose and pipe.
Sources [1]
Published specifications
Read each value with its stated conditions, and ask the manufacturer for any limit not listed here.
| Specification | Published value | Meaning / limit |
|---|---|---|
| RT-9816 connection and pressure | G1 inch; 2.0–4.0 bar [1] | Catalogue figures. Ask for the thread drawing and nozzle table. |
| RT-9816 Range / Flow | 15–17 m / 3700–5000 L, as printed [1] | Ask whether Range is radius or diameter, and the time unit for Flow. |
| Larger model codes | Headings RT-9821 / RT-9821B; descriptions RT-9812 / RT-9812B [1] [3] [4] | The catalogue prints both codes. Ask Runte which one goes on the order. |
| Larger models connection and pressure | G1½ inch; 3.0–4.5 bar [1] [4] | The B photo also shows 1-inch and 2-inch pieces. Ask which connection is supplied. |
| Larger models Range / Flow | 22–25 m / 11000–12500 L, as printed [1] | Ask for the time unit, the Range definition and the test conditions. |
| Material | PP + POM for all three entries [1] | Ask for the material of each part, seals and UV resistance. |
Connection, adapters and mounting
The B photo shows separate pieces labelled 1 inch and 2 inches, while its description lists G1½ inch. Ask Runte which piece fits the gun, which side fits your riser, and what comes in the box, with an assembly drawing. Rain guns from other makers in the irrigation category make a fair benchmark for the same questions. On smaller plots, an impact sprinkler such as the Dewo DC-S2-3 is the usual alternative to weigh.
Gun connection
Ask whether the inlet is male or female, the thread designation and dimensions, and the model revision. Keep the printed G designation in your enquiry.
Adapters
Ask Runte to name each piece in the photo, both of its threads, and whether it is included or optional.
Mounting
Ask for the approved riser or stand, support needs and access for adjusting and servicing the gun and nozzle.
Water and seals
Describe the water and any fertiliser, and ask for seal compatibility, nozzle cleaning instructions and pressure limits.
Throw, spacing and coverage
The catalogue calls the distance figure Range. It does not say whether that is radius or diameter, or give mounting height, nozzle, wind or the water distribution pattern. Get those before turning 15–17 m or 22–25 m into a wetted area or a grid spacing.
Runte names sugarcane, cereals, tea and fodder as crops for these guns. Plan the layout with your designer: plot boundaries, crop height, wind exposure and the area you need to cover. Ask Runte for distribution data for your nozzle and the supported mounting. If you need a part circle to keep water off roads or neighbouring land, ask for the sector adjustment limits and instructions.
Agree how the setting will be checked on a representative part of the site, and compare the full reach with the area that gets enough water. Runte publishes no water-saving or yield figures for these guns.
What the quotation should settle
Ask Runte for a written answer on the points above, tied to the gun it quotes and the parts included. The four items below make a workable order baseline.
Model
One model code (9821 or 9812), with the nozzle, drawing and photo all referring to the same gun.
Hydraulics
Flow unit, nozzle-by-nozzle pressure, flow and throw, the Range definition and the test conditions.
Mechanical
Gun connection, adapter names and quantities, and the mounting arrangement. Confirm whether the 1-inch and 2-inch pieces come with the order.
Delivery and trial
Check markings, nozzle and included parts on arrival. Agree the trial conditions and coverage check, spares and service instructions.
Buyer questions
Is the larger gun RT-9821 or RT-9812?
The catalogue heading says RT-9821 and the description says RT-9812. Ask Runte to confirm one code in writing before ordering. [1] [3]
Is 11000–12500 L per hour?
The catalogue gives no time unit. Ask Runte for the unit and the nozzle and pressure it applies to. [1]
Does the RT-9821B have a G1½-inch connection?
The description says G1½ inch; the photo shows pieces labelled 1 inch and 2 inches. Ask for the connection drawing and the parts list. [1] [4]
Can I space guns 25 m apart?
Range is not defined as radius or diameter and no distribution data is given. Work out spacing from your nozzle's performance and your site. [1]
Prepare a model-specific brief
Write your actual conditions below. This local worksheet is not sent, uploaded or saved after reload. Copy or print it before leaving.
Sources
Specifications come from the manufacturer's publications listed below, with the date each was checked.
- Official rain-gun catalogue entries
manufacturer · Checked 2026-10-12
Three entries with connection, pressure, Range, Flow and material; the larger models are headed RT-9821/RT-9821B and described as RT-9812/RT-9812B.
- Official image labelled RT-9816
manufacturer · Checked 2026-10-12
Black rain gun with its rotating mechanism.
- Official image labelled RT-9821
manufacturer · Checked 2026-10-12
Black larger rain gun, titled after the RT-9821 heading.
- Official image labelled RT-9821B with separate adapters
manufacturer · Checked 2026-10-12
Green and black rain gun with separate pieces labelled 1 inch and 2 inches.
Report a correction through our contact form, quoting RT-9816 / RT-9821 / RT-9821B and the relevant specification.