Esfahan Steam Equipment - PR-15 Type Pressure Reducing Valve for Steam

1. PR15 Type Pressure Reducing Valve

Description:
	The PR15 is a cast iron direct acting below sealed pressure reducing valve. The standard version has a silicon rubber diaphragm and is suitable for steam and a stainless steel disc and seat ring. Note: to protect the actuator diaphragm on steam applications a water seal pot must be installed in the downstream pressure signal line to the actuator.

Available Type:

PR15 bellows sealed DN25 to DN80 having flanged connections, with availability in 3 pressure ranges.

Downstream Pressure Ranges :

Valve Type	Diaphragm Type	Pressure Range (bar)

PR15 - S4	PR4di	*0.6 - 2.5

PR15 - S2	PR2di	**2 - 5

PR15 - S1	PR1di	***4.5 - 9

* DN25 and DN32 Range 0.6 - 1.8 bar, DN40 and DN50 Range 0.8 - 2.5 bar, DN65 and DN80 Range 0.8 - 2.8 bar
** DN25 and DN65 and DN80 Range 2.5 - 5.5 bar, DN32 and DN40 Range 1.5 - 5 bar, DN50 Range 2 - 5 bar
***DN25 to DN50 Range 4.5 - 9 bar, DN65 and DN80 Range 5 - 9 bar

Sizes and Pipe Connections:
	DN 25, 32, 40, 50, 65, 80 Flanged PN16 (DIN 2502) are available.

Limiting Conditions :

Maximum body design condition	PN 16

Maximum design temperature	225°C

Maximum cold hydraulic test pressure	30 kgf/cm²

Maximum differential pressure (∆p)	14 kgf/cm²

Maximum ambient temperature	0°C

Cv Values :

Size	DN25	DN32	DN40	DN50	DN65	DN80

Cv	8	12	20	32	50	72

Note: The capacity of E.S.E valves is expressed as the flow co-efficient Cv.The flow co-efficient value Kvs is extensively use in Europe.
Its relationship to the Cv unit is given by Cv=1.167 Kvs.

Dimensions (mm) :

Size	Flanged PN16		Downstream pressure range
	Flanged PN16		S1		S2		S4
	L	G	H	W	H	W	H	W
DN25	118	57	330	127	315	183	350	265
DN32	118	70	340	127	315	183	350	265
DN40	205	75	345	127	315	183	355	265
DN50	205	83	352	127	315	183	352	265
DN65	320	92	548	127	550	183	551	265
DN80	320	100	550	127	550	183	560	265

Installation

Caution:
To protect the actuator diaphragm on steam applications a water pot must be installed in the downstream pressure signal line to the actuator. The valve should be mounted vertically downwards in a horizontal pipeline with the direction of flow as indicated by the arrow on the valve body. Full installation and maintenance instructions are supplied with the product.

Materials :

No.	Part	Material
1	Body	G.G. 25
2	Seat	S.S. 304 or 316
3	Bolt	C.S. Galva
4	Disc	S.S. 304 or 316
5	Disc Rod	S.S. 304 or 316
6	Pin	S.S. 304 or 316
7	Gasket	Clingrit
8	Adjusting bolt	Brass
9	O-Ring	Teflon
10	Bonnet	G.G. 25
11	Scale	C.S.
12	Packing	Graphite or Teflon
13	Gland	Brass
14	Adjusting Nut	Brass
15	Spring Out	Cadmium Plate
16	Spring In	Cadmium Plate
17	Spring Seat	G.G. 25
18	Lock Bolt	C.S. Galva
19	Bolt	C.S. Galva
20	Casing	G.G. 25
21	Diaphragm Plate	G.G. 25
22	Diaphragm Support	Aluminum
23	Diaphragm	Silicon Rubber
24	Upper Casing	C.S.
25	Actuator Stem Screw	C.S.
26	Adjusting Air Vent	Brass
27	Bolt	C.S. Galva
28	Nut	C.S. Galva
29	Spring Gasket	C.S. Galva
30	Name Plate	Aluminum
31	Pin	Aluminum
32	Nut	C.S. Galva
33	Spring Gasket	C.S. Galva

Valve Weights (Kg):

		DN 25	DN 32	DN 40	DN 50	DN 65	DN 80
Weight	S1	12	14	16.5	17.7	31.3	31.3
	S2	13.4	14.4	17	18.5	31.8	32.5
	S4	17.4	18.3	20.6	22.1	35.2	36.4

How to Order:
	Example: DN25 PR15-S4 direct acting pressure reducing valve flange PN16.
	Design and specifications are subject to change without notice.