C.I. Diaphragm Valve

C.I. Diaphragm Valve Specification

Control System
Manual handwheel operated

Connection Type
Flanged or screwed ends as per standards

Valve Type
Diaphragm valve

Features
Corrosion resistant, leak proof shut-off, easy maintenance

Valve Size
Range from 15mm () up to 300mm (12)

Material
Cast Iron (C.I.)

Structure
Weir type, diaphragm actuated

Application
Suitable for corrosive and dirty fluids, acids, slurries, and water treatment plants

Sealing
Elastomeric diaphragm (rubber, EPDM, or other suitable material)

Type
C.I. Diaphragm Valve

Power
Manual operation

Pressure
Maximum working pressure 10 kg/cm

Media
Liquids, slurries, chemicals

Port Size
As per standard sizes, commonly available from 15mm to 300mm

Temperature
Up to 120C

Disc
Cast Iron / Rubber lined

Pin
Stainless Steel Pin

C.I. Diaphragm Valve Trade Information

Minimum Order Quantity
100 Pieces

Supply Ability
1000 Pieces Per Month

Delivery Time
1 Months

About C.I. Diaphragm Valve

We are Manufacture of Cast Iron Diaphragm Valves(Double Flanged).

NBØ	A	B	C	D	t	nØ	h	f	j	Operating pressure kg/cm²
25	127+1	90	85	115	16	4	14	2.5	100	14.0
40	159+1	138	110	150	16	4	18	2.5	120	12.25
50	190+1	160	125	165	18	4	18	2.5	140	12.25
65	216+1	180	145	185	18	4	18	2.5	165	10.50
80	254+1	210	160	200	21	4	19	3.0	203	10.50
100	305+1	260	180	220	22	8	19	3.0	254	10.50
150	406+1	362	240	285	23	8	23	4.0	355	8.75

All dimensions are in mm
The flanges of the valve shall be faced and drilled as per IS: 1538/IS:6392 or (party's requirements)
The valve as per BS : 5156.
Temperature range : 65o to 200oC
Max.pressure 14 kg/Cm (g) -200Psig.
Materials of diaphragm and body lining will be as per party's requirements.
Mechanism is isolated from fluid.
Hydrostatic test
Body test : 1.5 time nominal pressure rating
Seat test : 1 time nominal pressure rating

Superior Corrosion Protection

Each C.I. diaphragm valve is finished with high-quality paint or coating to protect against corrosion, extending the lifespan of the valve in harsh chemical or slurry environments. Optional rubber lining enhances chemical resistance further, making it suitable for highly corrosive media.

Precision Flow Control

The weir-type, diaphragm-actuated design ensures accurate flow control for both on-off and throttling service. The elastomeric diaphragm provides leak-proof shut-off performance (Class VI, bubble tight), which is crucial for hazardous or dirty fluids.

Versatile Application Range

Designed for compatibility with various connection standards (IS, DIN, BS, ANSI), these valves are suitable for use in water treatment, acid transfer, and industrial slurry handling. Their manual operation via a handwheel allows easy maintenance and adjustment.

FAQs of C.I. Diaphragm Valve:

Q: How do you select the appropriate diaphragm material for a C.I. diaphragm valve?

A: The diaphragm materialneoprene, EPDM, Viton, or EPshould be chosen based on the fluid being handled and service conditions. Each material has its own chemical compatibility and temperature resistance, catering to specific applications such as acids, corrosive liquids, and slurries.

Q: What is the process for installing the valve in a pipeline system?

A: The valve can be mounted horizontally or vertically, utilizing either flanged or screwed ends as per the chosen connection standard. Proper alignment and secure fastening are essential, followed by leak and functional tests to ensure optimal performance.

Q: When is manual actuation preferred for diaphragm valves?

A: Manual actuation, using a handwheel, is ideal when frequent adjustments or direct operator control is necessary. It is commonly used in scenarios where process control does not require automation or rapid cycling, ensuring reliable operation with easy maintenance.

Q: Where are C.I. diaphragm valves typically used for optimal performance?

A: These valves are widely employed in water treatment facilities, chemical plants, and slurry handling systems. Their corrosion-resistant features and bubble-tight seal make them especially effective in environments with dirty, abrasive, or hazardous fluids.

Q: What benefits does the optional rubber lining provide?

A: The optional rubber lining significantly boosts chemical resistance, minimizing the risk of corrosion and extending the valves service life in aggressive media applications. This feature supports long-term reliability in industrial environments.

Q: How is leakage prevented in these valves during operation?

A: A Class VI bubble-tight seal is achieved via an elastomeric diaphragm, which completely isolates the process media from the stem, ensuring no leakage even during critical service conditions.

Q: What maintenance requirements should be considered for these valves?

A: Routine inspections of the diaphragm, handwheel mechanism, and lining (if present) are recommended. Easy dismantling enables quick replacements and ensures continued leak-free performance with minimal operational downtime.