Description
Chemical Resistant Check Valve with Hastelloy-C Spring and PTFE Ball
Backflow can contaminate a chemical feed line or disrupt dosing. The Jaco Kynar PVDF check valve provides automatic one-way control through a spring-loaded PTFE ball. Its PVDF body, Hastelloy-C spring, and Viton O-ring support corrosive-fluid service. The valve opens at 1-2.5 PSI and uses male NPT connections. It comes in 1/4, 3/8, and 1/2-inch sizes for chemical injection and water treatment systems.
Key Features and Benefits
- This low cracking pressure check valve opens at 1-2.5 PSI and closes against reverse flow. JACO publishes zero leakage for the valve series.
- The chemical resistant check valve combines a PVDF body, Hastelloy-C spring, PTFE ball, and Viton O-ring for corrosive-service evaluation.
- JACO publishes a maximum operating temperature of 180°F and maximum operating pressure of 220 PSI for this valve series.
- Male NPT ends fit matching female NPT ports. JACO requires PTFE pipe thread sealant or PTFE pipe seal tape on NPT connections.
- Every valve is 100% tested before shipment. For compatible chemical tubing and fittings, browse Chemical Resistant Tube & Fittings.
Specifications
This PVDF check valve uses JACO's corrosive-conditions internal configuration with a Hastelloy-C spring and PTFE ball.
| Specification | Details |
|---|---|
| Body Material | PVDF (Kynar) |
| Spring Material | Hastelloy-C |
| Ball Material | PTFE (Teflon) |
| O-Ring Material | Viton |
| Connection | Male NPT x Male NPT |
| Cracking Pressure | 1-2.5 PSI |
| Maximum Operating Temperature | 180°F |
| Maximum Operating Pressure | 220 PSI |
| Testing | 100% tested before shipment |
Available Sizes
Choose the male NPT check valve by the nominal female NPT port size at both connection points. Pipe size is a nominal designation, not a direct thread outside-diameter measurement.
| Male NPT Size | Cleanflow Option |
|---|---|
| 1/4 inch | 1/4-inch MPT Check Valve |
| 3/8 inch | 3/8-inch MPT Check Valve |
| 1/2 inch | 1/2-inch MPT Check Valve |
Corrosive Configuration vs Standard JACO Check Valve Internals
This Hastelloy-C spring check valve uses the internal combination JACO lists for corrosive conditions. A standard JACO PVDF check valve uses a Grade 316 stainless ball and spring. Select the full assembly against fluid chemistry, temperature, and pressure because compatibility depends on the PVDF body, Viton O-ring, spring, and ball together.
How to Install a PVDF Check Valve
- Isolate and fully depressurize the line before installation.
- Confirm that both female ports match the selected male NPT size. Identify the required one-way flow direction before threading the valve into place.
- Apply PTFE pipe thread sealant or PTFE pipe seal tape to both male NPT threads. Use a sealing product compatible with PVDF and the process fluid. See available thread sealants.
- Thread the valve into the female ports carefully. Tighten only enough to seal and avoid overtightening the plastic threads.
- Restore system pressure gradually, then inspect both threaded joints for leakage under operating conditions.
Applications
- Chemical injection systems: Prevent reverse flow in compatible chemical feed lines.
- Water treatment and dosing: Use the chemical dosing check valve in compatible metering and treatment systems.
- Corrosive fluid handling: Evaluate the PVDF, Hastelloy-C, PTFE, and Viton materials against the exact fluid.
- Industrial processing: Add one-way flow control to compatible threaded process lines.
- Laboratory and specialty systems: Use the compact PTFE ball check valve where the listed materials and ratings meet system requirements.
This PVDF non-return valve is intended for one-way fluid control. System designers must confirm media compatibility, pressure, temperature, installation, and maintenance requirements.
Buy Jaco Kynar PVDF Check Valves Online from Cleanflow
Cleanflow Utility Supply Company is an authorized JACO Manufacturing supplier serving Canada and the United States. Select the Jaco Kynar PVDF check valve by male NPT size. Browse the JACO fittings collection for related components.
Order with free shipping on purchases over $199 and a 30-day return policy. Email info@cleanflow.ca for returns, exchanges, or product questions.
Frequently Asked Questions
What does a PVDF check valve do?
A PVDF non-return valve permits flow in one direction and closes when pressure reverses. This spring-loaded model uses a PTFE ball and opens when forward differential pressure reaches its published 1-2.5 PSI cracking range.
What is check valve cracking pressure?
Cracking pressure is the forward differential pressure required to begin opening the valve. This low cracking pressure check valve starts opening between 1 and 2.5 PSI. Actual system flow still depends on pressure, fluid properties, piping, and operating conditions.
Does a PVDF check valve need PTFE tape?
Yes. JACO states that PTFE pipe thread sealant or PTFE pipe seal tape must be used on NPT connections. Apply it to both male threads and confirm that the selected sealing product is compatible with PVDF and the process fluid.
Can a PVDF check valve handle chlorine?
PVDF has strong resistance to chlorine and other halogenated chemicals, but the full valve must be evaluated. Confirm compatibility with the PVDF body, Hastelloy-C spring, PTFE ball, Viton O-ring, concentration, temperature, pressure, and UV conditions.
What size PVDF check valve do I need?
Match the valve's nominal male NPT size to both female NPT ports. Cleanflow lists 1/4-inch, 3/8-inch, and 1/2-inch options. Do not select by measured thread outside diameter alone because NPT sizes are nominal designations.
Similar Products
Featured collection
