Product Banner

Pressure Reducing Valve DP-143

Pressure Sensing PipeThe DP 143 valve controls the downstream pressure by sensing the down stream pressure through an external sensing pipe taken from down stream to the pilot valve chamber (10) Fitting of this external pressure sensing pipe is described in the User manual .

If the external sensing pipe is not provided then the valve controls by internal pressure sensing pipe (19). However the capacity in this case will be reduced.

How to specify:

  • (Example 1) 20 NB SPIRAX MARSHALL DP -143 FOR STEAM FLANGED TO BS 10 TABLE 'K' IBR (OR NIBR).

  • (2) 40 NB SPIRAX MARSHALL DP 143 FOR AIR FLANGEDTO ANSI 300 NIBR.

Pressure Reducing Valve Dp 143
Pressure Reducing Valve 2 Dp 143

Sizes

  • NB 15,20, 25,40, 50 and 80. Std. Accessories: Pr. Gauge, syphon & Gauge cock

Pipe Connections:

  • Flanged to - BS10 table - 'J' * & 'K' ANSI - 300' & '600' DIN - ND - '25' &* '40'

  • *Note - 80 NB has these flanges only. Available with IBR certificate Also available for air applications.

Dimensions/Weights (approximate) in mm and kg

SIZE NB A B C D E
15 147 175 400 130 270
20 167 175 410 130 280
25 184 216 425 154 271
40 255 280 490 185 305
50 253 280 490 185 305
80 330 350 580 258 322

Kv Values

NO DESCRIPTION MATERIAL STANDARD
1 Adjustment Screw C Steel HT IS 1367Gr 8.8
12 Adjustment Lock nut C Steel HT IS 1367 Gr 80
3 Washer SS Type 304 ASTM A-240
4 Spring Housing C I IS 210 FG 260
5 Top Spring Plate C-20 IS 2062
6 Pressure Adjustment Spring Spring Steel IS 4454 Part IV Gr 1
7 IS 4454 Part IV Gr 1 Part IV Gr 1 ASTM A 276
8 Spring Housing Cast stee H TIS 1367 Gr88
Securing Studs Nuts Cast steel H T IS 1367Gr 8
9 Pilot Diaphragm S S Type 304 ASTM A -240
10 Pilot Valve Chamber Cast Steel ASTMA-216Gr WCB
11 Pilot Valve Plunge S S Type 304 ASTM A -27
12 Spring Housing Cover S S Type 304 ASTM A -240
13 Pilot Valve & Seat Unit S S Type 304 ASTM A -276
14 Internal Strainer S S Type 304 ASTM A -240
15 Body Gasket Reinforced exfoliated graphite
16 Main Valve Return Spring Spring Steel IS 4454 Part IV Gr 1
17 Main Valve S Steel Type 304 ASTM A 276
18 Main Valve Seat S Steel Type 420 ASTM A-213
19 Pressure Sensing Pipe S Steel Type 304 ASTM A-213
20 Main Valve Body Cast Steel ASTMA-216Gr WCB
21 Pilot Valve Securing C Steel HT IS 1367Gr 88
studs Nuts C. Steel HT IS 1367Gr
22 Main Diaphragm Chamber Cast Steel ASTM A-216 Gr WCB
23 Main Diaphragm C Steel HT. IS 1367Gr 88
Securing Studs Nuts C Steel HT IS 1367Gr 8
24 Main Diaphragms SS Type 304 ASTM A240
25 Main Diaphragm Plate SS Type 304 ASTM A. 276
26 Push Road S S Type 304 ASTM A-276
27 Pipe Assembly S S Type 304 ASTM A-213
28 Plug 1/8 BSP C Steel ASTM A-105
29 Lock Nut SS Type 304 HT IS 1367Gr 8
30 Body Stud Nut C Steel C Steel HT IS 1367Gr 88
HT IS 1367 Gr 8
Pressure Reducing Valve Dp 143 2
Pressure Reducing Valve Dp 143 3
Categories