Injection Quills

Koflo Chemical Injection Quills are used to introduce medium to highly corrosive chemicals into a pipeline without damage to the side port or pipe wall at the point of injection. Chemical injection quills ensure that chemicals are evenly dispersed into the center of the pipeline, which prevents channeling of the chemical down the pipe wall. The body and stinger are both constructed of chemical resistant plastics or alloys (PVC, Kynar, 316 SS, or Hastelloy C-276). Injection quills with 3” to 8” long stingers are available from stock. All injection quills come with female by male NPT connections for ease of installation.

Now available in 1/2", 3/4", and 1" connection sizes!

Koflo line of chemical injection quills: PVC, Stainless Steel, Kynar®, and Hastelloy® injection quills

All quill models are available and in-stock:

Request Pricing
Size comparison of 3 and 5 inch PVC injection quill stinger lengths

Multiple In-Stock Stinger Lengths

Koflo stocks all quill sizes and materials in multiple stinger lengths. Custom stinger lengths are available for all connection sizes and materials upon request. Refer to the Technical Specifications table (below) for a complete list of in-stock configurations.

Precision-Engineered Components

Machined housings ensure reliable and even chemical dispersion within the center of the pipeline. During the manufacturing process, all quills are individually tested to Koflo's high standards and are guaranteed to be leak-free. Each unit comes complete with an integral removable spring-loaded ball check to prevent flow of the injected chemical into the main flow when the system is shut down.

Hastelloy injection quill Exploded

Available Material Options:


Moderate chemical resistance

PVC injection quill body

316/L Stainless Steel

Moderate chemical resistance

316 stainless steel injection quill body

PVDF Kynar®

Improved chemical and corrosion resistance

Kynar® injection quill body

Hastelloy® C-276

Superior chemical, temperature, and corrosion resistance

Hastelloy® C-276 injection quill body

Technical Specifications

Quill Model
Check Ball
Pressure (PSI)1
Pressure (PSIG)2
Temp (°F)2
QP-.5-31/2"3"PVCHastelloy® CCeramic503150140
QP-.5-51/2"5"PVCHastelloy® CCeramic503150140
QP-.75-43/4"4"PVCHastelloy® CCeramic5150140
QP-.75-63/4"6"PVCHastelloy® CCeramic5150140
QP-1.0-51"5"PVCHastelloy® CCeramic5150140
QP-1.0-81"8"PVCHastelloy® CCeramic5150140
QK-.5-31/2"3"PVDF (Kynar)Hastelloy® CCeramic503150280
QK-.5-51/2"5"PVDF (Kynar)Hastelloy® CCeramic503150280
QK-.75-43/4"4"PVDF (Kynar)Hastelloy® CCeramic5150280
QK-.75-63/4"6"PVDF (Kynar)Hastelloy® CCeramic5150280
QK-1.0-51"5"PVDF (Kynar)Hastelloy® CCeramic5150280
QK-1.0-81"8"PVDF (Kynar)Hastelloy® CCeramic5150280
QS-.5-31/2"3"316/L SSHastelloy® CCeramic5033000500
QS-.5-51/2"5"316/L SSHastelloy® CCeramic5033000500
QS-.75-43/4"4"316/L SSHastelloy® CCeramic53000500
QS-.75-63/4"6"316/L SSHastelloy® CCeramic53000500
QS-1.0-51"5"316/L SSHastelloy® CCeramic53000500
QS-1.0-81"8"316/L SSHastelloy® CCeramic53000500
QH-.5-31/2"3"Hastelloy® CHastelloy® CCeramic5033000500
QH-.5-51/2"5"Hastelloy® CHastelloy® CCeramic5033000500
QH-.75-43/4"4"Hastelloy® CHastelloy® CCeramic53000500
QH-.75-63/4"6"Hastelloy® CHastelloy® CCeramic53000500
QH-1.0-51"5"Hastelloy® CHastelloy® CCeramic53000500
QH-1.0-81"8"Hastelloy® CHastelloy® CCeramic53000500

1Cracking pressure refers to the differential pressure between the injection and process lines required to open the intergrated check valve. Quill pressure drop is substantially lower than the cracking pressure once the check valve has opened.

2Maximum pressures are listed at ambient temperature. Maximum temperatures assume ambient pressure. For applications with elevated temperature and pressure, consult Koflo for de-rating factors.

3Low cracking pressure (5 psi) versions available.