ProMixUSA Logo
+1-866.776.6964
Flanged Fixed Injection Quill
Fixed Injection Quills - Image 2
Fixed Injection Quills - Image 3
Fixed Injection Quills - Image 4
Fixed Injection Quills - Image 5
Fixed Injection Quills - Image 6
Fixed Injection Quills - Image 7
Fixed Injection Quills - Image 8
Fixed Injection Quills - Image 9
Fixed Injection Quills - Image 10
Fixed Injection Quills - Image 11
Fixed Injection Quills - Image 12
Fixed Injection Quills - Image 13
Fixed Injection Quills - Image 14
, ,

Fixed Injection Quills

Price range: $94.00 through $1,481.00

Fixed Injection Quills are essential devices used in industrial processes to introduce a controlled amount of chemicals, additives, or fluids into a pipeline or process stream.
They ensure precise dosing and even distribution while protecting the pipeline from localized corrosion or damage.

What Are Fixed Injection Quills?

A Fixed Injection Quill is a tube or pipe with multiple holes or nozzles designed to evenly distribute the injected substance into the center of the main process flow.
By injecting directly into the higher-velocity center stream, they promote excellent mixing and create a homogenous chemical blend.

They are commonly used in water treatment, chemical processing, oil & gas, power generation, and many other industrial applications where accurate chemical dosing is critical.

Key Benefits

Improved Dispersion Injects into the center of the pipe where turbulence improves mixing and creates uniform distribution.
Pipeline Protection Prevents localized corrosion or damage at the injection point by avoiding direct contact with the pipe wall.
Chemical Compatibility Available in a wide range of materials including PVC, CPVC, Kynar, PTFE (Teflon), 316L Stainless Steel, Hastelloy C-276, and Titanium.
Customization Can be customized with different lengths, nozzle configurations, and connection sizes to meet specific process requirements.

Proper installation and regular maintenance of Fixed Injection Quills are critical to ensure accurate dosing, reliable performance, and extended service life of both the quill and the pipeline system.

SKU: 325500 Categories: , , Tags: , , , , , , , , , , , , , , , , , , , , , Brand:
Our Fixed Injection Quills and machined housings deliver reliable and even chemical dispersion at the center of the pipeline. Furthermore, we individually test every quill during the manufacturing process. This ensures they meet high standards and remain completely leak-free. In addition, each unit features a built-in, removable spring-loaded ball check. This check valve prevents the injected chemical from flowing back into the main process line when the system is switched off. As a result, operators enjoy consistent performance and enhanced safety in their chemical dosing systems.

What Are Fixed Injection Quills?

Fixed injection quills are devices used in industrial processes and chemical dosing systems to introduce additives — such as liquid chemicals or solutions — into a pipeline or process stream with controlled and precise dosage.

They typically consist of a tubular housing connected to the main pipeline, with a dedicated injection point where the additive is introduced. This design allows for accurate distribution, ensuring uniform mixing and the desired chemical reactions.

Fixed injection quills are commonly used in industries including water treatment, chemical processing, and oil & gas.

Key Benefits

Improved Mixing Introduces the additive at a specific point with precise dosage, resulting in better dispersion and more uniform mixing.
Reduced Equipment Corrosion Ensures even distribution of corrosion inhibitors and other protective chemicals, helping extend equipment lifespan.
Increased Safety Provides a designated injection point that minimizes leaks, spills, and operator exposure to hazardous chemicals.
Enhanced Control Can integrate with monitoring systems for real-time adjustment of injection rates and automated dosage control.

Design Features

Fixed injection quills introduce the additive at a specific point within the pipeline, away from high turbulence or velocity areas.
This protects the injected chemical from direct contact with the main process fluid, preserving its integrity and effectiveness.

The design also allows for easy maintenance and replacement of components without major disruption to the system.

Fixed injection quills deliver accurate, controlled, and safe chemical addition while protecting both the additive and the overall system.

Other Areas of Interest:
• Static Mixers
• Tank Mixers
Weight 0.5 lbs
Dimensions 12 × 6 × 6 in
Connection Size

1/2", 3/4", 1"
Stinger Length

2", 3", 4", 5", 6", 8"
Body Material

PVC, PVDF (Kynar), 316L SS, Hastelloy C
Check Valve

No, Yes

Specifications

Our Fixed Injection Quills feature simple and reliable connections: ½”, ¾”, or 1” MNPT male process connection and matching ½”, ¾”, or 1” MNPT male chemical inlet connection.

Key Features

Process Connection ½”, ¾”, or 1” MNPT male
Chemical Inlet Connection ½”, ¾”, or 1” MNPT male
Check Valve (Optional) Built-in spring-loaded check valve with 10 psi crack pressure to prevent backflow
Nozzle Design V-notch and dispersion holes for proper alignment and even chemical dispersal
Standard Quill Length 2-3/4 inches (custom lengths available up to 24 inches)

For applications that do not require a check valve, the injection quills are supplied without one as standard.

Custom lengths are available — simply specify the desired quill length when ordering.

Injection Quills

ModelBody MaterialConnection SizeProbe LengthCheck MaterialMax Temp
IQP-0.5-3PVC1/2"3"316LSS142
IQP-0.5-5PVC1/2"5"316LSS142
IQK-0.5-3PVDF1/2"3"PVDF294
IQK-0.5-5PVDF1/2"5"PVDF294
IQSS-0.5-3316LSS1/2"3"316LSS550
IQSS-0.5-5316LSS1/2"5"316LSS550
IQHC-0.5-3Hastelloy® C1/2"3"Hastelloy® C750
IQHC-0.5-5Hastelloy® C1/2"5"Hastelloy® C750
IQP-0.75-4PVC3/4"4"316LSS142
IQP-0.75-6PVC3/4"6"316LSS142
IQK-0.75-4PVDF3/4"4"PVDF294
IQK-0.75-6PVDF3/4"6"PVDF294
IQSS-0.75-4316LSS3/4"4"316LSS550
IQSS-0.75-6316LSS3/4"6"316LSS550
IQHC-0.75-4Hastelloy® C3/4"4"Hastelloy® C750
IQHC-0.75-6Hastelloy® C3/4"6"Hastelloy® C750
IQP-1-5PVC1"5"316LSS142
IQP-1-8PVC1"8"316LSS142
IQK-1-5PVDF1"5"PVDF294
IQK-1-8PVDF1"8"PVDF294
IQSS-1-5316LSS1"5"316LSS550
IQSS-1-8316LSS1"8"316LSS550
IQHC-1-5Hastelloy® C1"5"Hastelloy® C750
IQHC-1-8Hastelloy® C1"8"Hastelloy® C750
Technical Specifications Table

Pressure Drop

Pressure Drop Across Fixed Injection Quill

Fixed Injection Quill – ½” Chemical Inlet (Standard Nozzle Design)
Process Line: Water (1 cP) at 68°F (20°C) • Quill Insertion: Center of 6″ Pipe

Typical Pressure Drop vs. Chemical Injection Flow Rate

Injection Flow Rate (GPH)  |  Pressure Drop (psi)
─────────────────────────────────────────────
5                |    2.8
10                |    6.5
20                |   12.5
30                |   19.5  ← Typical Design Point
40                |   27.5
50                |   36.5
60                |   46.5

Common design target: 7 – 10 bar (100 – 145 psi) differential pressure to ensure reliable injection and good dispersion into the center of the process stream.

Key Notes on Pressure Drop for Fixed Injection Quills

  • The pressure drop shown is the differential pressure required between the chemical feed pump and the process line pressure.
  • Fixed injection quills typically include a V-notch, dispersion holes, or check valve at the tip, which creates the necessary backpressure for proper atomization and mixing.
  • A common industry guideline is to design for approximately **100 psi (7 bar)** differential pressure to achieve good chemical distribution into the center of the pipeline.
  • Higher process line velocity improves dispersion but can slightly affect the effective injection pressure needed.
  • Smaller orifices or multi-hole nozzles increase pressure drop; larger orifices reduce it but may compromise mixing quality.
  • Actual pressure drop depends on quill length, nozzle design, check valve crack pressure (typically 10 psi), and process fluid properties.

Fixed Injection Quills are designed to inject chemicals directly into the center of the process stream for optimal mixing and to protect the pipe wall from localized corrosion.
The pressure drop across the quill (including nozzle and check valve) is a critical design parameter to ensure the injection pump can deliver the required flow rate against the line pressure.

For precise pressure drop calculations based on your specific quill model, orifice configuration, injection rate, and process conditions, consult the manufacturer for a custom performance curve.

Installation

Proper installation of Fixed Injection Quills is essential for accurate chemical dosing, even dispersion, leak-free performance, and long-term reliability.

Follow these steps carefully to ensure safe and optimal operation.

Installation Procedure

Step Installation Procedure Tools / Materials Required Safety Notes
1 Shut down the process line, isolate the section, depressurize completely, and apply lockout/tagout (LOTO) procedures. Lockout/Tagout kit, blinds, pressure gauge Ensure zero energy state before beginning work.
2 Prepare the installation location on the pipeline. Drill and tap the pipe (or weld the nozzle) perpendicular to the flow direction. Drill, tap set, welding equipment (if required), thread sealant Follow ASME B31.3 or applicable piping codes.
3 Apply thread sealant or gasket to the quill’s process connection and install the quill body into the tapped nozzle or welded fitting. PTFE tape or approved sealant, torque wrench Tighten to manufacturer’s recommended torque value only.
4 Ensure the quill tip extends to the correct depth — typically 1/3 to 1/2 of the pipe’s internal diameter — for optimal chemical dispersion. Depth gauge or manufacturer marking Quill tip must not touch the opposite pipe wall.
5 Connect the chemical feed line to the quill’s inlet connection using appropriate fittings and sealant. Compatible tubing or fittings, thread sealant Verify all connections are tight and leak-free.
6 Slowly repressurize the line and perform thorough leak checks around the quill body and all connections. Pressure gauge, leak detection solution Use appropriate PPE. Monitor for at least 30 minutes.
7 Document installation details, torque values, insertion depth, and test results in the equipment maintenance log. Include photos if possible. Installation checklist, camera Record quill serial number and installation date.

Important Note: Always refer to the manufacturer’s specific installation manual for your Fixed Injection Quill model.
Ensure all work complies with site safety standards, piping codes (e.g., ASME B31.3), and proper chemical handling procedures.
Improper installation can lead to leaks, poor chemical dispersion, or system contamination.

Maintenance

Regular maintenance of Fixed Injection Quills is essential to ensure accurate chemical dosing, prevent clogging, avoid leaks, and extend the service life of the equipment.
Follow these procedures to maintain optimal performance.

Maintenance Procedures

Maintenance Task Procedure & Recommendations
Routine Visual Inspection • Check for signs of corrosion, damage, leaks, or external wear
• Inspect the injection point and connections for tightness and integrity
• Look for any buildup or discoloration around the quill
Cleaning • Flush the quill with a compatible solvent or cleaning solution to remove residue
• Use only cleaning agents approved for the quill material and injected chemicals
• Disassemble if necessary and clean internal surfaces, nozzle, and tip thoroughly
• Rinse completely and dry before re-installation
Nozzle & Tip Inspection • Examine the V-notch and dispersion holes for blockages or wear
• Clean or replace the nozzle if flow is restricted or dispersion is uneven
Check Valve (if equipped) • Test the optional spring-loaded check valve for proper operation (10 psi crack pressure)
• Clean or replace if backflow prevention is compromised
Seals & Connections • Inspect all seals, gaskets, and threaded connections for wear or leaks
• Replace any damaged seals immediately to prevent chemical leakage
Performance Verification • Monitor injection flow rate and uniformity
• Verify even dispersion into the process stream
• Adjust or clean if dosing accuracy has decreased
Documentation • Record all maintenance activities, inspections, cleanings, and part replacements
• Note any issues and actions taken for future reference

Important Note: Always follow the manufacturer’s specific maintenance guidelines for your Fixed Injection Quill model.
Use only compatible materials and cleaning agents. Regular maintenance prevents clogging, ensures accurate dosing, and significantly extends the service life of the quill.

Q&A

Question Answer
What is a retractable injection quill? A retractable injection quill is a specialized device used to inject chemicals into pressurized pipelines or vessels. It can be safely retracted behind an isolation valve for maintenance or replacement without shutting down the process line.
How does a retractable injection quill differ from a fixed quill? Unlike fixed quills that are permanently installed, retractable quills feature a movable inner tube and packing gland system. This allows the quill to be fully retracted for cleaning, inspection, or replacement while the process remains operational.
What are the main benefits of using retractable quills? Key benefits include reduced downtime, improved safety by minimizing chemical exposure, easier maintenance, adjustable insertion depth, and the ability to perform maintenance under pressure in many applications.
In which industries are retractable injection quills commonly used? They are widely used in Oil & Gas, Petrochemical, Refining, Water Treatment, Power Generation, Chemical Processing, Pulp & Paper, Mining, and Food & Beverage industries.
What materials are typically used for retractable injection quills? Standard wetted parts are 316 Stainless Steel. Exotic materials such as Hastelloy C-276, Titanium, and Alloy 20 are available for highly corrosive applications.
What is the typical pressure and temperature rating? Most standard models are rated up to 1500 PSI (103 bar) at 100°F. Temperature ratings reach 400°F (204°C) with PTFE packing and up to 600°F (316°C) with Grafoil packing.
How often should retractable injection quills be maintained? Daily visual inspections are recommended. Full maintenance (cleaning, seal inspection, and lubrication) is typically performed monthly to quarterly, depending on the aggressiveness of the injected chemical and operating conditions.
Can retractable quills be used in high-pressure applications? Yes, many models are designed for pressures up to 1500 PSI or higher. However, always verify the specific model’s pressure rating matches your process conditions and follow manufacturer guidelines for safe retraction under pressure.
What safety precautions are necessary when retracting a quill? Always wear appropriate PPE, fully isolate and depressurize when possible, follow lockout/tagout procedures, bleed off trapped pressure, and strictly adhere to the manufacturer’s retraction procedure. Never force the quill if resistance is felt.
How do I determine the correct insertion depth? The recommended insertion depth is typically 1/3 to 1/2 of the internal pipe diameter. This ensures optimal chemical dispersion while preventing the quill from touching the opposite pipe wall. Exact depth should be confirmed with process engineers and manufacturer recommendations.
Are retractable quills more expensive than fixed quills? Yes, retractable quills have a higher initial cost due to their more complex design. However, they often provide significant long-term savings by reducing downtime, improving safety, and extending overall system reliability.
What should I consider when choosing a retractable injection quill? Key factors include process pressure and temperature, chemical compatibility with materials, pipe size, required insertion length, frequency of maintenance, safety requirements, and total cost of ownership. Consulting with the manufacturer for your specific application is highly recommended.

Note: Always refer to the specific manufacturer’s installation, operation, and maintenance manual for your retractable injection quill model. Proper selection, installation, and maintenance are critical for safe and reliable performance.

Advantages / Disadvantages

Advantages Disadvantages
  • Allows insertion and removal without shutting down the process line
  • Reduces downtime and maintenance costs significantly
  • Enables safe retrieval for inspection, cleaning, or replacement
  • Provides flexibility to adjust injection depth as needed
  • Minimizes exposure of personnel to hazardous chemicals
  • Excellent for continuous chemical injection applications
  • Can be used in high-pressure systems with proper procedures
  • Higher initial purchase cost compared to fixed quills
  • More complex design with additional moving parts and seals
  • Requires regular maintenance of packing gland and seals
  • Potential for leaks if packing is not properly maintained
  • Heavier and bulkier than standard fixed injection quills
  • Installation requires more space around the pipeline
  • Operator training is necessary for safe retraction procedures

Note: Retractable injection quills are ideal when minimizing process downtime is a priority. Proper training, regular maintenance, and adherence to manufacturer guidelines are essential to maximize benefits and ensure safe operation.

Applications

Industry / Application Typical Chemicals Injected Purpose / Benefits
Oil & Gas Production Corrosion inhibitors, scale inhibitors, demulsifiers, H₂S scavengers Prevents pipeline corrosion and scaling in wellheads and flowlines
Petrochemical & Refining Antifoulants, neutralizers, corrosion inhibitors Protects heat exchangers, towers, and piping from fouling and corrosion
Water Treatment & Wastewater Coagulants, flocculants, pH adjusters, disinfectants (chlorine, sodium hypochlorite) Ensures uniform chemical distribution in large pipelines and tanks
Chemical Processing Catalysts, reactants, additives Precise injection into reactors and mixing lines
Power Generation (Cooling Water) Biocides, scale & corrosion inhibitors, oxygen scavengers Maintains efficiency of cooling towers and condensers
Pulp & Paper Industry Bleaching agents, sizing chemicals, retention aids Improves process control and reduces downtime
Food & Beverage Processing Sanitizers, pH regulators, preservatives Ensures hygienic and uniform chemical addition
Mining & Mineral Processing Flotation reagents, pH modifiers, cyanide detoxifiers Enhances recovery rates and protects equipment

Note: Retractable injection quills allow safe insertion and removal without shutting down the process line, making them ideal for continuous operations where downtime must be minimized. Always select materials and pressure ratings according to the specific process conditions.

Downloads

Drawings

You may also like…

Related products