Dry Type Sprinkler
Dry pendent sprinkler helps prevent freezing in cold areas.
Available in K80–K363 flow ratings.
Temperature ratings range from 57°C to 141°C.
Custom lengths from 80 mm to 1500 mm.
Suitable for cold storage, parking areas, docks, and attics.
Description
Ca-Fire Protection Co.,Ltd is one of the most credible manufacturers and suppliers of dry type sprinkler in China. Welcome to wholesale custom made fire equipment products at competitive price from our factory. Contact us for more cheap products.
Products Description
Stays dry until the moment it has to work
A dry pendent sprinkler moves the water seal up to the branch line, so the drop nipple and the head itself hold nothing but air - no standing water to freeze, split a fitting, or flood a ceiling before a fire ever starts.
K80–K363 flow coefficients
57–141°C temperature range
80–1500mm made-to-order length
Overview
In a dry-pipe or preaction system, the branch line above a standard pendent head stays charged with water right down through the drop nipple and into the sprinkler body. Once the surrounding air drops below freezing, that trapped water expands as it turns to ice and splits the fitting from the inside - often silently, until the system is called on and fails, or thaws and floods the space below.
A dry-type sprinkler solves this at the hardware level. Its water seal sits at the top of the assembly, at the connection to the branch line, so the entire drop - nipple, barrel, and sprinkler head - stays air-filled at all times. There's no column of standing water anywhere below the seal for a cold snap to act on.
It's the standard fix for loading docks, parking structures, cold-storage anterooms, exposed canopies, and any wet-system branch that has to pass through a space that isn't heated year-round.
PRODUCT RANGE
T-ZSTGX 80–68°C Q5
Exposed Pendent
The reference configuration: chrome deflector and heat-sensitive element sit fully exposed below a hinged escutcheon, laid out just like a conventional wet pendent head for straightforward retrofits.
T-ZSTGDY 80–68°C Q5
Flush / Concealed-Style
Same dry barrel and branch-line seal, dressed with a flush chrome cover plate that sits nearly flat against the ceiling - for finished interiors where a low profile matters more than a visible deflector.
T-ZSTGX 80–68°C Q5 CC
Socket Connection (CC)
A plug-in, socket-style (CC) connection for direct coupling without a threaded reducer, with the rating plate printed on the barrel itself for fast identification on site.
TECHNICAL DATA
| K-factor | Nominal operating temp. | Max. ambient temp. | Bulb colour | Connection | Thermal element | RTI (response) | Mounting |
|---|---|---|---|---|---|---|---|
| K=80 | 57°C / 135°F | 27°C / 81°F | Orange | R½ (K80/K115) | 5 mm glass bulb | 50–80 (m·s)0.5 | Pendent |
| K=115 | 68°C / 154°F | 38°C / 100°F | Red | R½ (K80/K115) | 5 mm glass bulb | 50–80 (m·s)0.5 | Pendent |
| K=161 | 79°C / 174°F | 49°C / 120°F | Yellow | R1¼ (K161/K202/K242) | 3 mm glass bulb | ≤50 (m·s)0.5 | Pendent |
| K=202 | 93°C / 199°F | 63°C / 145°F | Green | R1¼ (K161/K202/K242) | 3 mm glass bulb | ≤50 (m·s)0.5 | Pendent |
| K=242 | 141°C / 286°F | 111°C / 232°F | Blue | R1¼ (K161/K202/K242) | 3 mm glass bulb | ≤50 (m·s)0.5 | Pendent |
| K=363 | 68°C / 154°F | 38°C / 100°F | - | R1¼ – grooved | Fusible alloy block | 80–360 (m·s)0.5 | Pendent |
| K=363 | 74°C / 165°F | 44°C / 111°F | - | R1¼ – grooved | Fusible alloy sheet | 80–360 (m·s)0.5 | Pendent |
Note: overall length is made to order from 80 mm to 1500 mm to suit drop depth through insulation, ceiling cavities, or roof decking.
WHERE THEY'RE SPECIFIED
Cold storage anterooms
Dock-side buffer zones and blast-chiller entries where product stays cold but people and pipework can't.
Parking structures
Open decks and unheated ramps on a wet system fed from a heated riser room.
Loading docks & canopies
Exposed overhangs and dock doors that see outdoor air for most of the day.
Unheated attics & voids
Roof-line branch runs and mechanical penthouses outside the conditioned envelope.
FAQ
Q: What actually keeps a dry sprinkler from freezing?
A: The water seal sits at the top of the fitting, at the branch-line connection, instead of down at the orifice. Everything below that seal - the drop nipple and the sprinkler body - holds air, not water, so there's no trapped column for a cold snap to freeze and expand.
Q: How is this different from just using a dry-pipe system everywhere?
A: A dry-pipe system keeps the whole network free of water until it trips. A dry-type sprinkler is a local fix for one branch or drop on an otherwise wet system, so you don't have to convert an entire floor just because one loading dock or canopy is exposed to freezing air.
Q: Can the drop length be customized for our ceiling?
A: Yes. Overall length is made to order from 80 mm to 1500 mm, so the head can reach through insulation, a suspended ceiling void, or roof decking to sit at the correct plane.
Q: How do I choose between the six temperature ratings?
A: Pick the rating for the hottest condition the head will realistically see in service, then confirm the K-factor against your hydraulic design - the datasheet above lists all six, from 57°C at K80 up to 141°C at K242.
Q: Glass bulb or fusible alloy - does it matter which?
A: It affects response speed. The glass-bulb range (K80–K242) responds faster, with an RTI of 50–80 for the 5 mm bulb and ≤50 for the 3 mm bulb. The K363 fusible-alloy version trades some of that speed (RTI 80–360) for its grooved, high-flow connection.
Our address
NO.8, YUANFENG ROAD, MEIYUAN VILLAGE, KANGMEI TOWN, NANAN CITY, QUANZHOU CITY, FUJIAN CHINA
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