Product

Lined Diaphragm Valve

Lined diaphragm valves isolate operating parts from process media for clean, controlled and corrosion resistant service.

Tight shut-off Low maintenance Corrosion resistant

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Product Overview

Application and service highlights

Introduction

Lined diaphragm valves are preferred in corrosive services that benefit from clean shut-off, isolated operating parts and low dead space within the valve body. They are commonly applied in dosing lines, batch transfer and contamination-sensitive chemical handling.

Key Features

Separates process media from the operating mechanism.
Supports clean shut-off for corrosive liquid handling.
Useful in applications requiring controlled and hygienic-style flow separation.

Specifications

Material, dimensions and testing standards

Material

Valve Body: Robust metallic construction with corrosion resistant lining.
Seats & Seals: PTFE-based soft sealing elements for dependable shut-off.
Trim: Configured to suit process pressure and media compatibility.

Dimensions

Offered in standard line sizes for process and utility services.
Flanged drilling available to match common plant standards.
Compact face-to-face dimensions support retrofit installations.

Testing

Seat leak and shell testing before dispatch.
Lining continuity inspected with spark testing.
Operational cycling checked for smooth performance.

Technical Drawing

Cross-sectional reference

Dimensional Specifications

Dimensional table

Size		Diameter (D)	Raised Face (R/F)	P.C.D (K)	Flange Thick. (T)	No. of Holes (N)	Hole Dia (B)	Lining Thickness (±0.5mm)	Length ± 5mm (Max L)
NB	Inch
25	1"	33.7	50	79	15	4	15	3	600
40	1.5"	48.3	65	95	17	4	18	3	600
50	2"	60.3	80	127	19	4	19	3	500
80	3"	88.9	100	152	22	4	22	3	400
100	4"	114.3	125	178	24	8	22	3	300