Piston type diaphragm seal KD 21

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Data sheet Piston type diaphragm seal KD 21

Benefits

Piston instead of diaphragm: For extremely rough conditions with abrasive media
For pressures from 10 bar to 600 bar
Robust and reliable pressure measurement
Shock- and vibration-resistant

Application

For mounting to Bourdon tube pressure gauges, pressure transducers or pressure switches. For corrosive, polluted and abrasive suspensions at high pressures. Specially for pressure measurements in waste water, drilling water, sludge, concrete, plaster and minerals.

Versions

Process connection	Instrument connection	Nominal pressure	Minimum range* (in bar) at nominal size				Part no.	Remember
	Instrument connection	Nominal pressure	63	100	160	DMU	Part no.	Remember
G½B	Welded connection	PN 600	10 bar	16 bar	16 bar	10 bar	31420W
G¾B	Welded connection	PN 600	10 bar	16 bar	16 bar	10 bar	31421W
G1B	Welded connection	PN 600	10 bar	16 bar	16 bar	10 bar	31422W
G1½B	Welded connection	PN 600	10 bar	16 bar	16 bar	10 bar	31423W
G2B	Welded connection	PN 600	10 bar	16 bar	16 bar	10 bar	31424W
½-14 NPT	Welded connection	PN 600	10 bar	16 bar	16 bar	10 bar	31425W
¾-14 NPT	Welded connection	PN 600	10 bar	16 bar	16 bar	10 bar	31426W
1-11½ NPT	Welded connection	PN 600	10 bar	16 bar	16 bar	10 bar	31427W
1½-11½ NPT	Welded connection	PN 600	10 bar	16 bar	16 bar	10 bar	31428W
2-11½ NPT	Welded connection	PN 600	10 bar	16 bar	16 bar	10 bar	31429W

Blue part no. = in-stock items

Downloads

	Description	Format
Data sheet Piston type diaphragm seal KD 21	Data sheet	PDF
DMU 13 Vario	Level indicators and level controllers	PDF
Enquiry chemical seals	Product range industrial technology	PDF
Enquiry chemical seals	Checklists	PDF
STP file (3D) KD21_31420W	CAD file	STP
STP file (3D) KD21_31421W	CAD file	STP
STP file (3D) KD21_31422W	CAD file	STP
STP file (3D) KD21_31423W	CAD file	STP
STP file (3D) KD21_31425W	CAD file	STP
STP file (3D) KD21_31426W	CAD file	STP
STP file (3D) KD21_31427W	CAD file	STP
STP file (3D) KD21_31428W	CAD file	STP
STP file (3D) KD21_31429W	CAD file	STP
Fitting of / combination possibilities of AFRISO pressure gauges and chemical seals	CAD filePressure measuring instruments	PDF

Technical data

Process connection

Stainless steel 316 L

Seal

FKM (Viton)

Pressure connection

Stainless steel 316 L
Flush

Instrument connection

Welded connection

Pressure transmission liquid

Paraffin oil (FM 09), FDA-listed

Pressure range

See ordering table

Nominal pressure

PN 600

Accuracy

With pressure gauge CI. 2.5
With pressure transducer 1.0 % FSO

Can be mounted to

Bourdon tube pressure gauges NG 50, 63, 80, 100, 160 and RF 130 PG
Pressure transducers (DMU)
Pressure switches (DS)

Options

Adapter for instrument connection G¼/G½
Capillary tube
Flange connections EN, ASME, JIS
Other process connections
Other materials
Other filling liquids, except for Neobee M20 (FM 10)
Other measuring ranges

Technical drawings

Click the corresponding image for detail views, additional information and dimension tables.

Type KD 21

Dimensions (mm):

G	d	h	H	a	b	SW
G½B	26	17	33,5	3	3	27
G¾B	32	19	34	3	3	32
G1B	39	21	36	3	3	41
G1½B	55	25	48	3	3	55
G2B	68	27	56	3	3	70
½-14 NPT	-	20	33,5	-	-	27
¾-14 NPT	-	-	-	-	-	-
1-11½ NPT	-	24	36	-	-	41
1½-11½ NPT	-	25	45	-	-	55
2-11½ NPT	-	26	50	-	-	70