Esfahan Steam Equipment - CONTROL VALVE 51E TYPE WITH PNEUMATIC DIAPHRAGM ACTUATOR

Normal Open

Normal Close

2. 51E TYPE TWO WAY PNEUMATIC DIAPHRAGM CONTROL VALVE ( PROPORTIONAL)

Description:
	The 51E type is a range of two-way cast iron single seat globe valves with proportional pneumatic actuator in size DN25 to DN80 (1” to 3”) available with flanged connections, suitable for steam and liquid. The 51E type provides characterized modulating flow control, which contains two types, Normal Close (N.C.) and Normal Open (N.O.). The pneumatic actuators are a range of single spring linear actuators having a diaphragm for 3-15 psi (0.2-1 bar) air pressure. Each actuator is fitted with a combined mechanical stroke indicator. For control with pneumatic actuator an I/P transducer required.

Available Type :


Valve Type	Type of Operating	Air Operating Pressure Range (psi)

51E - N.C.	Normal Close	3 - 15

51E - N.O.	Normal Open	3 - 15

Sizes and Pipe Connections:

DN 25, 32, 40, 50, 65, 80 Flanged PN16 (DIN 2502) are available.

Limiting Conditions :

Maximum design pressure	10 kgf/cm²
Maximum design temperature	PTFE Packing 180°C
Maximum design temperature	Graphite Packing 300°C
Maximum cold hydraulic pressure test	20 kgf/cm²
Body design conditions	PN 16

Technical Data :

Applicable Fluid	Steam, liquid
Operating	Linear	Normal close
		Normal open
Type of valve	Single seated
Characteristics	Proportional (linear)
Air Operating range	3 - 15 psi (0.2 - 1 bar)
End connection	Flanged PN 16
Leakage	Metal to Metal (0.01 % of Cv)
Air supply actuator connection	¼" PT
Actuating	Pneumatic
Stem Seal	PTFE packing 180 °C
	Graphite packing 300 °C
Plug Design	Parabolic

Dimensions (mm):

Size		Operating type
		N.C.	N.O.	N.C	N.O.
	W	L	L	H	H	G
DN25 ( 1" )	265	120	160	455	493	57
DN32 (1 ¼" )	265	120	160	455	490	70
DN40 (1 ½" )	265	202	207	455	505	75
DN50 ( 2 " )	265	203	207	495	548	82.5
DN65 ( 2 ½" )	265	322	322	548	548	92.5
DN80 ( 3 " )	265	322	322	550	550	100

Weights (Kg):

Size	DN 25	DN 32	DN 40	DN 50	DN 65	DN 80

Normal Open	20	21.3	24.5	26.3	35.7	35.7

Normal Close	19.5	18.8	24	26	35.3	35.7

Cv Valves:

Note: The capacity of E.S.E control valves is expressed as flow co-efficient Cv.
The flow co-efficient valve Kvs is extensively used in Europe. Cv=1.167 Kvs.

Materials :

No.	Part	Material
1	Body	G.G. 25
2	Bonnet	G.G. 25
3	Yoke	G.G. 25
4	Packing Flange	Cast Iron
5	Upper Diaphragm Casing	ST37 (C.S.)
6	Lower Diaphragm Casing	ST37 (C.S.)
7	Diaphragm Plate	Cast Iron
8	Casting Ring	Cast Iron
9	Spring	Cadmium Plate
10	Actuator Stem	ST37 (C.S.)
11	Valve Stem	S.S. 304 or 316
12	Lower Spring Bottom	Cast Iron
13	Spring Adjuster	Brass
14	Seat Ring	S.S. 430 or 316
15	Valve Plug	S.S. 430 or 316
16	Yoke Luck Nut	Brass
17	Diaphragm	Nylon Insert
18	Plug Nut	S.S. 304 or 316
19	Packing	Graphite or Teflon
20	Gasket	Clingrit
21	Stud Bolt	C.S. Galva
22	Spring Gasket	C.S. Galva
23	Nut	C.S. Galva
24	Bolt	C.S. Galva
25	Spring Gasket	C.S. Galva
26	Nut	C.S. Galva
27	Nut	C.S. Galva
28	Indicator	S.S. 304
29	Gauge	Aluminum
30	Bolt	C.S.
31	Actuator Stem Screw	C.S.
32	O-Ring	Teflon
33	Bolt	C.S. Galva
34	Spring Gasket	C.S. Galva
35	Bolt	C.S. Galva
36	Dyne Seat Washer	Rubber
37	Name Plate	Aluminum
38	Pin	Aluminum

Installation:

The valve should be installed in a horizontal pipeline with the direction of flow as indicated by the arrow on the valve body.
The air supply should be installed in the ¼” PT air supply connection on top of the actuator.

How to Order:

Example: DN25 51E-N.C., Diaphragm Control Valve with PTFE packing.

Design and specifications are subject to change without notice.