Grundfos NK Serie Instrucciones De Instalación Y Funcionamiento página 16

Mechanical shaft seal
Shaft seal diameter [mm]
d5 [mm]
Rubber bellows seal, metal-impregnated carbon/silicon carbide,
EPDM
Rubber bellows seal, metal-impregnated carbon/silicon carbide,
FKM
Rubber bellows seal, silicon carbide/silicon carbide, EPDM
Rubber bellows seal, silicon carbide/silicon carbide, FKM
Bellow seal, type B, with reduced seal faces, silicon carbide/silicon
carbide, EPDM
Bellow seal, type B, with reduced seal faces, silicon carbide/silicon
carbide, FKM
O-ring seal with fixed seal driver, silicon carbide/silicon carbide,
EPDM
O-ring seal with fixed seal driver, silicon carbide/silicon carbide,
FKM
O-ring seal with fixed seal driver, silicon carbide/metal-impregnated
carbon, EPDM
O-ring seal with fixed seal driver, silicon carbide/metal-impregnated
carbon, FKM
Rubber bellows seal, silicon carbide/synthetic resin-impregnated
carbon, EPDM
O-ring seal, balanced, metal-impregnated carbon/silicon carbide,
FXM
Rubber bellows seal, synthetic resin-impregnated carbon/silicon
carbide, EPDM
* -25 °C to +60 °C
Diameter of shaft end d5
Fig. 5
Stuffing box
Stuffing box without cooling, with internal barrier fluid
Stuffing box without cooling, without barrier fluid
Stuffing box without cooling, with external barrier fluid
16
28, 38
24, 32
Temperature
Code
range
BAQE 0 °C to +120 °C
BAQV 0 °C to +80 °C
BQQE 0 °C to +90 °C
BQQV 0 °C to +80 °C
GQQE -25 °C to +90 °C
GQQV -20 °C to +80 °C
AQQE 0 °C to +90 °C
AQQV 0 °C to +80 °C
AQAE 0 °C to +120 °C
AQAV 0 °C to +80 °C
BQBE 0 °C to +140 °C
DAQF 0 °C to +140 °C
BBQE 0 °C to +120 °C
Code Temperature range
SNE
SNO -30 °C to +120 °C
SNF
48 55 60
42 48 60
Maximum pressure [bar]
16 16 16 16
16 16 16 16
16 16 16 16
16 16 16 16
16 16* 16* 16*
16 16* 16* 16*
25 25 16 16
25 25 16 16
25 25 25 25
25 25 25 25
16 - - -
25 25 25 25
16 16 16 16
Maximum pressure [bar]
16