TOZEN

SPECIFICATION

FOR BS 4504 PN25 FLANGE MOUNTING
FACE-TO-FACE DIMENSION TO ISO 5752-82

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PRESSURE / TEMPERATURE RATINGS

Working Pressure	25 bar
Testing Pressure	Shell : 37.5 bar Seat : 27.5 bar
Working Temperature	-10°C to 120°C (EPDM Seat) -10°C to 80°C (NBR Seat)
Suitable Media	Water, Oil & Gas

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MATERIALS

Part	Material	BS
Body	Ductile Iron	2789 Gr. 420/12
Disc	Ductile Iron Aluminum Bronze Stainless Steel 304 Stainless Steel 316	2789 Gr. 420/12 1400 AB2 304 C15 316 C16
Spring	Stainless Steel 316	316 S16
Shaft	Stainless Steel 316	316 S16
Seat Ring	EPDM NBR

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DIMENSIONS

Size mm	A mm	B mm	C mm	D mm
50 65 80 100 125 150 200 250 300	43 46 64 64 70 76 89 114 114	106 126 141 164 192 220 280 335 394	29 36 42 53 64 77 102 127 149	19 20 28 27 30 31 33 50 43

*B = Outside diameter for PN25 flange mounting.

Note:
1. Other flange standards available upon request.
2. If used for gas application, please contact our sales office.
3. Design and specifications are subject to change without prior notice.