C.I. Diaphragm Valve

C.I. Diaphragm Valve Specification

Connection Type
Flanged Ends

Sealing Type
Rubber / EPDM / PTFE Diaphragm

Thread Type
NA (Flanged Connection)

Yield Strength
Not less than 130 MPa

Tolerance
2% nominal size

Tensile Strength
Minimum 200 MPa

Bend Radius
NA (Rigid Valve)

Temperature Range
up to 80C

Coating Type
Epoxy / Bitumen

Diameter
15mm to 300mm

Flexibility
Rigid

Product Type
Diaphragm Valve

Material
Cast Iron (C.I.)

Connection
Flanged

Shape
Straight/Weir Type

Standard
ISI / BS / DIN

Surface Treatment
Painted / Epoxy Coated

Outer Diameter
As per ANSI/BS standards

Section Shape
Round Body

Length
Varies by size (Typically 100-400mm)

Thickness
Heavy Duty

Color
Dark Green / Black

Usage
Flow Control / Isolation

Rated Pressure
PN10 / PN16

Application
Industrial Water, Chemical, Effluent Treatments

Material Grade
FG 200 / IS 210

Face to Face Dimension
As per IS 11790 / ISO 5752

Leakage Rating
Bubble Tight

Bonnet Material
Cast Iron

Weight
Depends on size (Approx. 3kg to 60kg)

Mounting
Horizontal/Vertical

Handwheel Material
Cast Iron / Mild Steel

Operation
Manual

Diaphragm Material
EPDM / PTFE / Nitrile

End Connection Standard
ANSI B16.5 / IS 1538

Corrosion Resistance
High (with Epoxy Coating)

Media Handled
Water, Chemicals, Slurries

Flow Direction
Bi-directional

Maintenance
Easy Maintenace, Field Replaceable Diaphragm

Disc Material
Rubber Moulded or PTFE Lined

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 Flow Control

Engineered for bi-directional flow, the C.I. Diaphragm Valve excels in handling liquids and slurries. The design ensures reliable performance and accurate isolation or regulation of media in demanding industrial applications, owing to its high-tensile strength, heavy-duty construction, and precision face-to-face dimensions as per industry standards.

Exceptional Corrosion Resistance

Protected by high-quality epoxy or bitumen coatings, the valves cast iron body provides excellent resistance against corrosion from aggressive chemicals and water. This robust surface treatment prolongs the valves lifespan and maintains its integrity even in harsh environments, ensuring consistent performance and reduced downtime.

Flexible Mounting & Easy Maintenance

The valve offers versatile installation, suitable for both horizontal and vertical mounting positions. Its field-replaceable diaphragm allows for quick maintenance or replacement, minimizing operational interruptions. The straightforward manual operation via a cast iron or mild steel handwheel supports user-friendly maintenance procedures.

FAQs of C.I. Diaphragm Valve:

Q: How do I install the C.I. Diaphragm Valve in my piping system?

A: The valve is designed for flanged-end connections as per ANSI B16.5 or IS 1538 standards. It can be mounted horizontally or vertically, ensuring compatibility with various piping layouts. Adhere to face-to-face dimensions specified in IS 11790/ISO 5752 for accurate installation.

Q: What are the benefits of using a rubber moulded or PTFE lined disc in the diaphragm valve?

A: Rubber moulded and PTFE lined discs enhance chemical compatibility and sealing. They offer excellent resistance against media such as chemicals, water, or slurries, ensuring bubble-tight leakage performance and extended operational life even under demanding process conditions.

Q: When should the diaphragm be replaced, and is it a field-replaceable component?

A: The diaphragm should be replaced during scheduled maintenance or if you notice wear compromising the valves sealing ability. It is designed as a field-replaceable part, allowing quick on-site replacement without dismantling the entire valve assembly.

Q: Where can this diaphragm valve be used?

A: This valve is versatile and suitable for industrial water supply, chemical processing, and effluent treatment plants. Its construction and corrosion-resistant coating make it ideal for handling aggressive fluids in varied industrial facilities across India and abroad.

Q: What maintenance is required for the C.I. Diaphragm Valve to ensure optimal performance?

A: Regular inspection of the diaphragm for wear and periodic lubrication of the handwheel mechanism are recommended. Thanks to its design, maintenance is straightforward, with easy access to replaceable parts, contributing to minimized downtime and extended valve lifecycle.

Q: How does the valve ensure high corrosion resistance in chemical applications?

A: Its cast iron body is specifically treated with epoxy or bitumen coatings, providing high resistance to corrosion from chemicals and effluents. This guarantees reliable operation and long-term durability in aggressive industrial environments.

Q: What is the primary usage and main advantage of this diaphragm valve over other types?

A: The valve is primarily used for flow control and isolation in industrial applications. Its key advantages are bi-directional flow capability, bubble-tight sealing, high corrosion resistance, and easy field maintenance, making it an efficient and robust solution for demanding operations.