Introduction
This manual provides essential information for the safe and effective installation, operation, and maintenance of the Swagelok SS-26VS8 Stainless Steel Integral Bonnet Needle Valve. Please read this manual thoroughly before using the product.
Figure 1: Swagelok SS-26VS8 Stainless Steel Integral Bonnet Needle Valve. This image displays the stainless steel needle valve with a T-handle for operation and 1/2-inch tube fittings on both ends. The Swagelok logo and flow direction arrow are visible on the valve body.
Safety Information
Always follow local safety regulations and industry best practices when working with pressure systems and valves. Ensure proper personal protective equipment (PPE) is worn. Do not exceed the maximum operating pressure or temperature ratings of the valve.
Setup and Installation
The Swagelok SS-26VS8 valve is designed for use with 1/2" tube fittings. Proper installation is crucial for leak-free operation and system integrity.
- Inspection: Before installation, inspect the valve for any signs of damage or foreign material.
- System Preparation: Ensure the tubing ends are clean, burr-free, and properly deburred.
- Fitting Assembly: Insert the tube into the fitting until it bottoms out against the shoulder. Tighten the nut finger-tight.
- Initial Tightening: For 1/2" Swagelok tube fittings, mark the nut at the 6 o'clock position. Tighten the nut 1-1/4 turns past finger-tight. For smaller sizes, refer to Swagelok's general installation instructions.
- Leak Testing: After installation, perform a leak test on the entire system at a safe pressure before putting it into full service.
Note: For detailed tube fitting installation instructions, refer to official Swagelok documentation or training resources.
Operating Instructions
The SS-26VS8 is an integral bonnet needle valve with a Vee stem, designed for precise flow control.
- Opening the Valve: Turn the T-handle counter-clockwise to open the valve and allow flow. The Vee stem design provides fine metering capabilities.
- Closing the Valve: Turn the T-handle clockwise to close the valve and stop flow. Do not overtighten, as this can damage the stem tip or seat.
- Flow Direction: Observe the flow direction arrow on the valve body during installation to ensure correct orientation.
Maintenance
Swagelok valves are designed for long-term, reliable service with minimal maintenance. However, periodic inspection is recommended.
- Leak Checks: Regularly check for external leaks around the packing and fittings.
- Cleaning: Keep the exterior of the valve clean. Do not use abrasive cleaners that could damage the stainless steel finish.
- Stem Packing Adjustment: If minor leaks occur around the stem, the packing nut may require slight tightening. Consult Swagelok's specific maintenance guidelines for proper procedure to avoid overtightening.
- Replacement: If the valve exhibits persistent leaks, significant wear, or damage, it should be replaced. Do not attempt unauthorized repairs.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| External Leak at Fittings | Improperly tightened fittings, damaged tubing, or damaged ferrules. | Retighten fittings according to Swagelok instructions. Inspect tubing and ferrules for damage and replace if necessary. |
| External Leak at Stem Packing | Loose packing nut, worn packing. | Slightly tighten the packing nut. If leak persists, the packing may need replacement (consult Swagelok service). |
| Valve Does Not Shut Off Flow Completely | Damaged stem tip or seat, foreign material in valve. | Do not force the valve. Disassemble (if trained and authorized) to inspect for foreign material or damage, or replace the valve. |
For issues not listed, or if solutions do not resolve the problem, contact Swagelok technical support or an authorized distributor.
Specifications
- Model Number: 1191Y09EA (SS-26VS8)
- Product Type: Integral Bonnet Needle Valve
- Material: Stainless Steel
- Cv (Flow Coefficient): 0.73
- Connection Type: Tube Fitting
- Connection Size: 1/2 inch
- Stem Type: Vee Stem
- Number of Ports: 2
- Exterior Finish: Stainless Steel
- Package Dimensions: 1 x 1 x 1 inches
- Package Weight: Approximately 14.4 ounces (0.9 lbs)
- Country of Origin: United States
- Certifications/Specifications Met: CE, CSA, EPA, NSF, OSHA, RoHS, UL
Warranty and Support
Swagelok products are backed by a limited lifetime warranty. For specific warranty terms and conditions, please refer to the official Swagelok website or contact your authorized Swagelok distributor.
For technical support, product inquiries, or to locate an authorized distributor, please visit the official Swagelok website: www.swagelok.com.
