High-Flow Spray · Storage Protection

Large K-Factor & ESFR Sprinklers

Two related but distinct product groups: large K-factor spray sprinklers for higher discharge capacity, and ESFR sprinklers for storage-protection applications. Match the exact model and operating element before ordering.

K11.2 / K161K14.0 / K202ESFR K14.0–K25.212 bar / 175 psiOEM / ODM

Ask on WhatsApp View available models

Large K-factor does not by itself define an ESFR sprinkler. ESFR project suitability, hydraulic design and installation criteria remain subject to the exact product technical data.

Product presentation

Spray and ESFR configurations.

Compare large K-factor spray sprinklers, fusible-link ESFR samples and the separate glass-bulb ESFR samples. The listed fusible-link specifications do not apply to the glass-bulb photographs; request model-specific data for those samples.

ESFR Pendent Series1 / 7

Technical overview

Two product groups, clearly separated.

Compare the US and metric K-factor values below to select the required sprinkler group.

Large K-Factor Spray Sprinklers

Available K-factors: K11.2 US / K161 metric; K14.0 US / K202 metric
Response options: Standard response with 5 mm bulb; quick response with 3 mm bulb for K161 models
Temperature: 68°C / 155°F
Installation: Upright and pendent; horizontal sidewall available for K202
Nominal connection: DN25 / 1 in NPT
Frame material: Copper
Surface finish: Chrome-plated
Max. working pressure: 1.2 MPa / 12 bar / approx. 175 psi
Standard packing: Packing requirements confirmed with the order

Project dataStorage commodity classification, maximum storage height, ceiling height, minimum design pressure, sprinkler spacing and hydraulic design data are available only against the exact model and project requirement. No UL, FM or other foreign approval is implied.

Available configurations

Models you can order

Select the product group first: large K-factor spray sprinkler or ESFR. Compare response type, K-factor, orientation, connection and temperature within that group.

Large K-Factor Spray Sprinklers

Product configuration	K-factor	Connection	Thermal element	Model
Standard Response Upright	K11.2 / K161	DN25 / 1 in NPT	5 mm bulb · 68°C	T-ZSTZ161-68°C Q5
Standard Response Pendent	K11.2 / K161	DN25 / 1 in NPT	5 mm bulb · 68°C	T-ZSTX161-68°C Q5
Quick Response Upright	K11.2 / K161	DN25 / 1 in NPT	3 mm bulb · 68°C	K-ZSTZ161-68°C Q3
Quick Response Pendent	K11.2 / K161	DN25 / 1 in NPT	3 mm bulb · 68°C	K-ZSTX161-68°C Q3
Standard Response Upright / Pendent	K14.0 / K202	DN25 / 1 in NPT	5 mm bulb · 68°C	ZSTZ.X202-68°C Q5
Standard Response Horizontal Sidewall	K14.0 / K202	DN25 / 1 in NPT	5 mm bulb · 68°C	ZSTBS202-68°C Q5

Fusible-Link ESFR Sprinklers

Product configuration	K-factor	Connection	Operating element	Model
ESFR Upright	K14.0 / K202	DN20 / ¾ in NPT	Fusible alloy · 74°C	ESFR-202/74°C UY
ESFR Pendent	K14.0 / K202	DN20 / ¾ in NPT	Fusible alloy · 74°C	ESFR-202/74°C PY
ESFR Upright	K16.8 / K242	DN20 / ¾ in NPT	Fusible alloy · 74°C	ESFR-242/74°C UY
ESFR Pendent	K16.8 / K242	DN20 / ¾ in NPT	Fusible alloy · 74°C	ESFR-242/74°C PY
ESFR Upright	K25.2 / K363	DN25 / 1 in NPT	Fusible alloy · 74°C	ESFR-363/74°C UY
ESFR Pendent	K25.2 / K363	DN25 / 1 in NPT	Fusible alloy · 74°C	ESFR-363/74°C PY

NPT connections apply to the model table above, including the 74°C fusible-link ESFR models. The separate 68°C K202 BSPT option is detailed below. Specify the exact model and connection before ordering.

Product photographs

Compare the construction and visible markings. Open a photograph to enlarge it; confirm the required configuration with the quotation.

K161 metric / K11.2 US — flat-deflector sprinkler sampleEnlarge photograph →

K161 metric / K11.2 US — upright sprinkler, 68°CEnlarge photograph →

Upright glass-bulb sprinkler — K202 / 68°CEnlarge photograph →

Pendent glass-bulb sprinkler — K202 / 68°CEnlarge photograph →

Horizontal sidewall glass-bulb sprinkler — K202 / 68°CEnlarge photograph →

Configuration details

Compare the specifications for each named configuration below. Values apply only to the configuration shown.

ESFR K202 / 68°C option

A separate 68°C upright/pendent option. These values do not replace the 74°C fusible-element model table above.

K-factor designation: K202
Material: Copper body
Connection: BSPT thread; nominal thread size specified with the order
Working pressure: 1.2 MPa / 12 bar

OEM / ODM support

Configured for your product program.

Model marking, thread form and export packaging can be reviewed against the selected sprinkler configuration and approved technical requirement.

Product markingCustomer brand and model marking according to available marking space.

Thread customizationAlternative thread forms produced to a confirmed drawing or approved sample.

Product configurationK-factor, orientation and operating element matched to the confirmed order.

Export packagingPrivate-label cartons, labels and shipping marks available for review.

Send us your sprinkler requirement.

Start with the product group, K-factor, orientation and quantity. Add connection, destination and required hydraulic documents when available.

WhatsApp inquiry Email sales