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Help CenterHigh-Pressure Double Ferrule Ball Valve With PTFE Seal and Bi-Directional Sealing
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The Stainless Steel Double Ferrule Ball Valve is an advanced industrial valve utilizing double ferrule connection technology. It features a patented design where the ferrule's internal blade embeds into the pipe's outer wall to create an annular groove seal, combined with a 24° tapered surface contact for weld-free rapid installation in piping systems. This valve is characterized by reliable connections, high pressure resistance, excellent sealing performance, repeatability, easy installation and maintenance, and safe, dependable operation.
Technical Specifications| Parameter | Specification |
|---|---|
| Nominal Pressure | 1.6-6.4 MPa (Maximum up to 42 MPa) |
| Operating Temperature | -20°C to +220°C (Special models: -196°C to +450°C) |
| Nominal Diameter | 5mm - 14mm |
| Applicable Media | Oil, water, gas, and other corrosive/non-corrosive media |
| Construction Material | 304, 316, 316L Stainless Steel |
| Connection Type | Double Ferrule Connection |
Standard Models: QJBV-3OD, QJ.3W-01, QJ-L-04, QJM-02, QJ.F-06OD, etc.
Imperial Sizes: 1/8", 1/4", 3/8", 1/2", 3/4", 1", 1-1/4"
Valve Body: Forged 304/316L stainless steel with surface roughness Ra≤0.4μm
Ball Assembly: Solid stainless steel ball with polished surface
Sealing System: PTFE (Polytetrafluoroethylene) self-lubricating sealing ring
Ferrule Assembly: Double sealing structure with front and rear ferrules
Drive Mechanism: Manual flat handle or handwheel operation
During the tightening process of the ferrule nut by 1¼ turns, the following sequential actions occur:
Mechanical advancement via threads pushes the ferrule nut forward, driving the rear ferrule forward
The valve body's tip inwardly compresses the front ferrule
The front ferrule eliminates tolerance between its inner diameter and pipe outer diameter
The front ferrule moves forward and inward, lifting its rear end to form a seal with the valve body's tapered surface
The rear ferrule moves inward, creating a second secure support on the pipe
Valve Body: 304, 316, 316L Stainless Steel
Ball: 304, 316 Stainless Steel
Seal Materials: PTFE, Reinforced PTFE (PPL DELRIN, PEEK)
Stem: 304SS, 316L Stainless Steel
Packing Material: Graphite, Reinforced Polypropylene
Design & Manufacturing: GB/T12224-1989, JB/T7747-1995
Thread Standards: GB/T7306.1
Connection Standards: ZG, G, NPT, BSPP, BSPT
Pressure Rating: Compliant with GB3733.1~3765-83 (1000psi-3000psi)
Pipe Preparation: Cut pipe to required length, remove burrs from inside and outside diameters, ensure cut surface perpendicularity ≤ half of pipe OD tolerance
Component Assembly: Slide nut and ferrule onto pipe in sequence, insert pipe into valve body's tapered hole bottom
Tightening Operation: Tighten nut while rotating pipe until stationary, then tighten nut additional 1-1⅓ turns
Torque Control: Use torque wrench in three stages to ensure ferrule deformation of 0.2-0.3mm
Opening: Rotate handle 90° counterclockwise to full open position
Closing: Rotate handle 90° clockwise to closed position
Operating Torque: ≤35N·m for smooth operation
Flow Regulation: Full-bore on/off valve; requires series installation of regulating valve for flow control
Petrochemical: Refining equipment, chemical processing plants, petrochemical facilities
Power & Energy: Power plant instrumentation pipelines, nuclear power station equipment
Food & Pharmaceutical: High-purity gas pipelines, sanitary-grade piping systems
Instrumentation: Pneumatic/hydraulic pipelines, instrument tubing
Metallurgical & Chemical: High-temperature/high-pressure conditions, corrosive media transfer
Oxygen Service: Requires degreasing treatment with oil residue ≤125mg/m²
High-Purity Gases: Bi-directional sealing ensures gas purity up to 9N grade
Corrosive Environments: 316L material suitable for chloride environments (>50ppm chloride requires Hastelloy C-276 ball)
Daily Inspection: Check handle/actuator position indicators to confirm valve status matches process requirements
Periodic Testing: Use infrared thermography to monitor valve body temperature; abnormal rises may indicate seal failure
Lubrication: Lubricate pneumatic actuators with 5-8ml of specific 221 grease
Seals: Replace when leakage reaches 10⁻³Pa·m³/s or visible plastic deformation occurs
Ball: Return for repair when surface scratches >0.05mm deep or hardness decreases by 10%
Ferrule Assembly: Mandatory replacement after 3 disassemblies or 5 years of service to prevent stress relaxation
Low Fluid Resistance: Full-bore design with minimal flow resistance equivalent to straight pipe
Excellent Sealing: Bi-directional sealing with extremely low leakage rate up to 10⁻⁹Pa·m³/s
Easy Operation: 90° rotation for quick opening/closing with minimal operating torque
Convenient Installation: Ferrule connection eliminates welding, suitable for fire/explosion prevention and high-altitude work
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Simple Maintenance: Straightforward structure with easy disassembly and component replacement
Lockable design prevents accidental operation
Suitable for high-pressure applications up to 42 MPa
Excellent corrosion resistance for various corrosive media
Long service life exceeding 5 years under normal conditions
This stainless steel double ferrule ball valve has become an indispensable control component in modern industrial piping systems, providing essential security and efficiency for various industries' safe production and operational performance.
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