CPVC Dual Block 3-Way Ball Valve

A CPVC Dual Block 3 Way Ball Valve is a thermoplastic industrial valve made from Chlorinated Polyvinyl Chloride (CPVC) that is designed to control, divert, or mix the flow of fluids through three ports. The term “Dual Block” refers to its true union design, where the valve body can be easily removed from the pipeline by loosening union nuts on both sides, allowing convenient maintenance without disturbing the entire piping system.

The CPVC Dual Block 3 Way Ball Valve has two modes of operation: input and output. A CPVC Dual Block 3 Way Ball Valve may be recommended in some systems when more than one medium is used. Instead of just two ports (entries), 3-way ball valves have three. This multiport arrangement can divert fluid from the primary valve input in two different directions via two independent valve outputs. The primary flow line is served by two separate and alternate inlets, which is another common application of CPVC Dual Block 3 Way Ball Valves.

CPVC Dual Block 3-Way Ball Valve Details

C – Overall Top Width
C1 – Inner Top Width
B – Overall Height
L – End to Center Length
Z – Face to Center Dimension
H – Overall Length (Face to Face)
d – Inside Diameter
E – Center to Bottom Distance

NPS	Outside Diam. (D)	No. of Holes	Diam. of Holes	Bolt Circle (BC)	Weight (lb)
1/2″	3.50	4	0.62	2.38	2.55
3/4″	3.88	4	0.62	2.75	3.10
1″	4.25	4	0.62	3.12	4.11
1 1/4″	4.62	4	0.62	3.50	7.71
1 1/2″	5.00	4	0.62	3.88	9.07
2″	6.00	4	0.75	4.75	11.00

Parameter	Specification
Material (Body)	CPVC (Chlorinated Polyvinyl Chloride)
Ball Material	CPVC (machined / polished)
Seat Material	PTFE (Teflon)
Seal / O-Ring Material	EPDM / FKM (Viton)
Stem Material	CPVC / Stainless Steel
Valve Type	3-Way Ball Valve (L-Port / T-Port)
Design Type	Dual Block (Double Union / True Union Design)
Operation	Manual (Lever) / Actuated (Pneumatic / Electric optional)
Nominal Size Range	½” to 4” (DN15 – DN100)
Connection Types	Socket, Threaded (BSP/NPT), Flanged
End Standards	ASTM, ANSI, DIN, BS
Pressure Rating	PN10 / PN16
Max Working Pressure	Up to 10–16 bar @ 23°C
Temperature Range	0°C to 95°C
Flow Configuration	L-Port (diverting) / T-Port (mixing/diverting)
Flow Direction	Multi-directional
Leakage Class	Bubble-tight shut-off
Standards	ASTM D1784, ISO 9393
Maintenance	Inline maintenance (removable unions)
Density	~1.45–1.58 g/cm³
Color	Grey / Off-white
Corrosion Resistance	Excellent resistance to acids, alkalis, salts
Chemical Resistance	Suitable for aggressive chemical fluids
Surface Finish	Smooth internal bore → low friction loss
Thermal Resistance	Higher heat resistance than PVC
Mechanical Strength	Good tensile and impact strength
Weight	Lightweight compared to metal valves
Durability	Long service life, non-corrosive
Scaling Resistance	No rust or scale formation
UV Resistance	Moderate (can be improved with additives)

High-Quality CPVC Construction
Excellent resistance to acids, alkalis, and corrosive chemicals.
Three-Way Flow Control
Available in L-Port (diverting) and T-Port (mixing/diverting) configurations.
Dual Block (True Union) Design
The removable valve body allows easy maintenance without disturbing the pipeline.
Compact & Space-Saving Design
Replaces multiple valves and fittings in one unit.
Leak-Tight PTFE Seats
Ensures smooth operation and bubble-tight sealing.
High Temperature Resistance
Suitable for operating temperatures up to approximately 90°C–95°C.
Smooth 90° Operation
Quarter-turn lever ensures quick and easy flow control.
Low Torque Operation
Precision-machined ball provides easy manual handling.
Actuator Mounting Option
Compatible with pneumatic or electric actuators for automation.
Corrosion-Free Performance
Non-metallic body prevents rust and scaling.
Multiple End Connections
Available in threaded, socket, and flanged types.
Wide Size & Pressure Range
Typically available from ½” to 4” in PN 10 and PN 16 ratings.

Nominal Size (DN)	Size (Inch)	Pressure Rating (PN)	Max Working Pressure	Hydrostatic Test Pressure	Temperature Limit
15 mm	½”	PN 16	16 Bar	24 Bar	Up to 90°C
20 mm	¾”	PN 16	16 Bar	24 Bar	Up to 90°C
25 mm	1”	PN 16	16 Bar	24 Bar	Up to 90°C
32 mm	1¼”	PN 16	16 Bar	24 Bar	Up to 90°C
40 mm	1½”	PN 16	16 Bar	24 Bar	Up to 90°C
50 mm	2”	PN 16	16 Bar	24 Bar	Up to 90°C
65 mm	2½”	PN 10	10 Bar	15 Bar	Up to 90°C
80 mm	3”	PN 10	10 Bar	15 Bar	Up to 90°C
100 mm	4”	PN 10	10 Bar	15 Bar	Up to 90°C

If you are searching for customized product designs that meet your requirements, don’t worry. Petron Thermoplast also offers custom product manufacturing services to meet the unique needs of various industries. Work with our expert engineers to create custom designs suited for your application.

Benefits of Using CPVC Dual Block 3-Way Ball Valve

1. Excellent Corrosion Resistance

Manufactured from CPVC, it resists acids, alkalis, salts, and aggressive chemicals, making it ideal for chemical industries.

2. Multi-Flow Control (3-Way Function)

Allows diverting or mixing of fluids through L-Port or T-Port design, reducing the need for multiple valves.

3. Dual Block (True Union) Design

The valve body can be removed easily without cutting the pipeline, simplifying maintenance and replacement.

4. Space & Cost Saving

One 3-way valve replaces two conventional valves and fittings, saving space and installation cost.

5. High Temperature Capability

Suitable for temperatures up to approximately 90°C–95°C.

6. Leak-Tight Performance

PTFE seats and seals provide reliable, bubble-tight shut-off.

7. Lightweight Construction

Easier handling and installation compared to metal ball valves.

8. Low Maintenance

Non-metallic body prevents rust, scaling, and corrosion buildup.

9. Automation Friendly

Can be fitted with pneumatic or electric actuators for automated systems.

10. Long Service Life

Resistant to chemical attack and environmental degradation.

Types of CPVC Dual Block 3-Way Ball Valve

Based on Ball Port Design

1️. L-Port (Diverter Type)

The internal ball has an “L” shaped bore.
Diverts flow from one inlet to one of two outlets.
Does not allow mixing of both outlets simultaneously.
Commonly used for directional flow control.

2️. T-Port (Mixing / Diverting Type) The internal ball has a “T” shaped bore.

Allows mixing of two inlets into one outlet or splitting one inlet into two outlets.
Can provide multiple flow patterns depending on ball design.
Suitable for mixing and distribution systems.

Based on End Connection Type

Threaded Type – For small pipelines and easy installation.
Socket (Cement Joint) Type – For permanent leak-proof joints.
Flanged Type – For larger pipelines and high-pressure systems.

Based on the Operation Method

Manual Lever Operated – Standard hand-operated valve.
Pneumatically Actuated – Air-operated for automated systems.
Electrically Actuated – Motorized control for remote operation.

Based on Pressure Class

PN 10 Type
PN 16 Type

Applications of CPVC Dual Block 3-Way Ball Valve

Process Industry

High Purity Applications

Electronic Industry

Electrical Industry

Semi-conductors Industry

Pharmaceutical Industry

Solar power panels

Sugar Industry

Paper & Pulp Industry

Nuclear Power Industry

Automotive Industry

DI water plants

Why Choose Petron Thermoplast?

Petron Thermoplast CPVC Dual Block 3 Way Ball Valves are efficient, reliable, and essential tools in industrial automation, offering precise control of flow, pressure, and temperature. Proper selection, correct installation, and regular maintenance to ensure that these valves perform optimally in practical applications. As industrial automation technology continues to advance, the CPVC Dual Block 3 Way Ball Valve will see broader applications and improved performance, providing a reliable foundation for safe, efficient, and stable production.