990.36

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WIKA · Pressure measurement · Family 990

Diaphragm seal with threaded connection

Name: Diaphragm seal with threaded connection
Brand: WIKA
SKU: H990.36

Diaphragm seal with threaded connection, flush diaphragm or with protective plate, for highly viscous, crystallising, abrasive media and hygienic applications.

EACCRN3-A Sanitary Standard3-A

Price

On request

Depends on configuration

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Description

Diaphragm seals are used for the protection of pressure measuring instruments in applications with difficult media. In diaphragm seal systems, the diaphragm of the diaphragm seal effects the separation of the instrument and the medium. The pressure is transmitted to the measuring instrument via the system fill fluid which is inside the diaphragm seal system.

For the implementation of demanding customer applications, there is a wide variety of designs, materials and system fill fluids available.

For further technical information on diaphragm seals and diaphragm seal systems see IN 00.06 'Application, operating principle, designs'.

Model 990.36 with flush diaphragm

The model 990.36 small diaphragm seal with threaded connection and flush diaphragm is suitable for versatile applications. This diaphragm seal, despite its compact dimensions, can also be used for high pressures.

Optionally, there are versions available in hygienic design or with protective plates.

Mounting of the diaphragm seal to the measuring instrument may be made via a direct connection, for high temperatures via a cooling element or via a flexible capillary.

For the material selection WIKA offers a variety of solutions, in which the diaphragm seal and the wetted parts can be made of identical or different materials. The wetted parts can, as an alternative, be coated.

Special features

Threaded connection for screwing in directly
Flush diaphragm with compact dimensions
High pressures for the process industry
Version with protective plate for increased wear resistance
Vacuum measuring ranges

Identification

Model	990.36
Product family	990
Subcategory	Diaphragm seal

Process conditions

Process connection	1 NPT2 NPTG 1G 2G ½G ¾G 1 ½½ NPT¾ NPT1 ½ NPTG 1/2G 3/4G 1 1/21/2 NPT3/4 NPT1 1/2 NPT
Process temperature	−50…+400 °C

Materials

Wetted parts material

Stainless steel 1.4571 (316Ti), Stainless steel 1.4435 (316L), Stainless steel 1.4539 (904L), Stainless steel 1.4541 (321), Duplex 2205 (1.4462), Superduplex 2507 (1.4410), Hastelloy C22 (2.4602), Hastelloy C276 (2.4819), Monel 400 (2.4360), Titanium class 2 (3.7035), Titanium class 7 (3.7235), Gold plating, Stainless steel 1.4404 / 1.4435 (316L), Titanium class 11 (3.7225), Wikaramic® coating, PFA (perfluoroalkoxy) coating, PFA coating

Sealing material

NBR, EPDM, FPM/FKM, Viton, FPM/FKM (Viton), EPDM 70, FKM 75

Certifications and approvals

Certifications

EACCRN3-A Sanitary Standard3-A

Additional details

Datasheet languages

Tables from datasheet

Model 990.36	Standard	Option
Permissible pressure	Depending on the process connection thread, see tables from page 5	Vacuum measuring ranges
Version	Flush diaphragm seal with diaphragm	■ Flush diaphragm seal with protective plate ■ Flush diaphragm seal with hygienic connection
Level of cleanliness of wetted parts	Oil and grease free per ASTM G93-03 level FWIKA standard (< 1,000 mg/m²)	■ Oil and grease free per ASTM G93-03 level D and ISO 15001 (< 220 mg/m 2 ) ■ Oil and grease free per ASTM G93-03 level C and ISO 15001 (< 66 mg/m 2 )
Origin of wetted parts	International	EU, CH, USA
Connection to the measuring instrument	Axial adapter	Axial adapter with G½, G¼, ½NPTor ¼NPT(female)
Type of mounting	Direct mounting	■ Capillary ■ Cooling element
Design per NACE	-	■ MR0175 ■ MR0103
Vacuum service (see IN 00.25)	Basic service	■ Premium service ■ Advanced service
Instrument mounting bracket (only for capillary option)	-	■ Form H per DIN 16281, 100 mm, aluminium, black ■ Form H per DIN 16281, 100 mm, stainless steel ■ Bracket for pipe mounting, for pipe outer Ø20 ... 80 mm, steel (see data sheet AC 09.07)

Wetted parts	Maximum permissible process temperature 1) in °C [°F]
Upper body of diaphragm seal	Diaphragm
Stainless steel 1.4404 / 1.4435 (316L)	Stainless steel 1.4404 / 1.4435 (316L)	400 [752]
Stainless steel 1.4435 (316L)	Stainless steel 1.4435 (316L)	400 [752]
Stainless steel 1.4539 (904L)	Stainless steel 1.4539 (904L)
Stainless steel 1.4541 (321)	Stainless steel 1.4541 (321)
Stainless steel 1.4571 (316Ti)	Stainless steel 1.4571 (316Ti)
Duplex 2205 (1.4462)	Duplex 2205 (1.4462)	300 [572]
Superduplex 2507 (1.4410)	Superduplex 2507 (1.4410)
Hastelloy C22 (2.4602)	Hastelloy C22 (2.4602)	400 [752]
Hastelloy C276 (2.4819)	Hastelloy C276 (2.4819)
Monel 400 (2.4360)	Monel 400 (2.4360)
Titanium class 2 (3.7035)	Titanium class 2 (3.7035)
Titanium class 7 (3.7235)	Titanium class 11 (3.7225)
Stainless steel 1.4435 (316L)	Wikaramic ® coating
PFA (perfluoroalkoxy) coating, FDA	260 [500]
PFA (perfluoroalkoxy) coating, antistatic
Gold plating	400 [752]

Wetted parts	Permissible process temperature 1) of the sealing in °C [°F]
Upper body of diaphragm seal	Protective plate
Stainless steel 1.4404 / 1.4435 (316L)	Stainless steel 1.4404 / 1.4435 (316L)	■ FPM/FKM,Viton -10 ...+200 °C [14 ... 392 °F] ■ NBR -20 ...+100 °C [-4 ...+212 °F] ■ EPDM -50 ...+100 °C [-58 ...+212 °F]
Stainless steel 1.4571 (316Ti)	Stainless steel 1.4571 (316Ti)
Hastelloy C22 (2.4602)	Hastelloy C22 (2.4602)
Hastelloy C276 (2.4819)	Hastelloy C276 (2.4819)
Monel 400 (2.4360)	Monel 400 (2.4360)
Titanium class 2 (3.7035)	Titanium class 2 (3.7035)
Titanium class 7 (3.7235)	Titanium class 11 (3.7225)
Stainless steel 1.4435 (316L)	Wikaramic ® coating

Standard	Male thread
	Standard	Option
Following DIN 3852-2	G½	■ G¾ ■ G1 ■ G1½ ■ G2
Following ASME B16.11	½NPT	■ ¾NPT ■ 1 NPT ■ 1½NPT ■ 2 NPT

View all (13)

Logo	Description	Country
	EAC (option) Pressure equipment directive	Eurasian Economic Community
-	MTSCHS (option) Permission for commissioning	Kazakhstan
®	3-A 1) (version with G 1 hygienic connection) Sanitary Standard	USA
-	CRN Safety (e.g. electr. safety, overpressure, ...)	Canada

G	PN	Dimensions in mm[in]
		h	l	Mb	SW	D
G½	400	43 [1.693]	20 [0.787]	17 [0.669]	27 [1.063]	32 [1.26]
G¾		50 [1.969]		22 [0.866]
G 1		59 [2.323]	28 [1.102]	25 [0.984]	41 [1.614]	45 [1.772]
G1½	250	63 [2.48]	30 [1.181]	40 [1.575]	55 [2.165]	60 [2.362]
G 2				52 [2.047]	60 [2.362]	68 [2.677]

G	PN	Dimensions in mm[in]
		h	l	Mb	SW	D
½NPT	600	40 [1.575]	19 [0.748]	14 [0.551]	27 [1.063]	32 [1.26]
¾NPT	400	50 [1.969]	20 [0.787]	17 [0.669]
1 NPT	250	53 [2.087]	25 [0.984]	25 [0.984]	36 [1.417]	40 [1.575]
1 ½NPT	100	59 [2.323]	26 [1.024]	40 [1.575]	55 [2.165]	60 [2.362]
2 NPT		60 [2.362]	27 [1.063]	52 [2.047]	60 [2.362]	68 [2.677]

G	PN	Dimensions in mm[in]
		h	l	SP	SW	D 1)
G½	400	43 [1.693]	20 [0.787]	15 [0.591]	27 [1.063]	32 [1.26]
G¾		50 [1.989]
G 1		59 [2.323]	28 [1.102]	24 [0.945]	41 [1.614]	41 [1.614]
G1½	250	61 [2.402]	27 [1.063]	36 [1.417]	55 [2.165]	55 [2.165]
G 2		63 [2.48]	30 [1.181]	40 [1.575]	60 [2.362]	68 [2.677]

G	PN	Dimensions in mm[in]
		h	l	SP	SW	D
½NPT	600	40 [1.575]	19 [0.748]	15 [0.591]	27 [1.063]	32 [1.26]
¾NPT	400	50 [1.969]	20 [0.787]
1 NPT	250	53 [2.087]	25 [0.984]	24 [0.945]	36 [1.417]	40 [1.575]
1 ½NPT	100	59 [2.323]	26 [1.024]	36 [1.417]	55 [2.165]	60 [2.362]
2 NPT		60 [2.362]	27 [1.063]	40 [1.575]	60 [2.362]	68 [2.677]

Material	PN	Temperature	Conformity	Colour	Order number
O-ring		range			O₁	O₂
EPDM 70	40 bar	-40 ...+145 °C	FDA 21 CFR 177.2600, USP XXV class VI and 3-A (18-03) Sanitary Standards class 2 (max. 8 %milk fat)	Black	14023833	14004173
FKM 75		-15 ...+200 °C	FDA 21 CFR 177.2600, USP XXIII class VI and 3-A (18-03) Sanitary Standards class 1		14337279	14004174

Material	Unified numbering system (UNS)
Stainless steel 316L (1.4404 or 1.4435)	S31603
Stainless steel 904L (1.4539)	N08904
Stainless steel 321 (1.4541)	S32100
Stainless steel 316Ti (1.4571)	S31635
Stainless steel 1.4466 (urea grade)	S31050
Duplex 2205 (1.4462)	S31803
Superduplex 1.4410	S32750
Tantalum (also lining)	R05200
Hastelloy C276 (2.4819)	N01276
Hastelloy C22 (2.4602)	N06022
Inconel 600 (2.4816)	N06600
Incoloy 825 (2.4858)	N08825
Inconel 625 (2.485)	N06625
Monel 400 (2.4360)	N04400
Nickel 200 (2.4066)	N02200
Nickel 201 (2.4068)	N02201
Titanium 3.7035 (class 2)	R50400
Titanium 3.7235 (class 7)	R52400
Zirconium GR702	R60702

Designation	Identi- fication number	Solidi- fication point	Boiling/ degradation point	Density at 25 °C	Kin.Viscosity at 25 °C	Remark
KN	°C	°C	g/cm³	cSt
Silicone oil	2	-45	+300	0.96	54.5	Universal application
Glycerine	7	-35	+240	1.26	759.6	FDA 21 CFR 182.1320
Silicone oil	17	-90	+200	0.92	4.4	Low temperatures
Halocarbon	21	-60	+175	1.89	10.6	Oxygen 1) and chlorine
Methylcyclopentane	30	-130	+60	0.74	0.7	For very low temperatures
High-temperature silicone oil	32	-25	+400	1.06	47.1	For high temperatures
Neobee® M-20	59	-35	+260	0.92	10.0	FDA 21 CFR 172.856, 21 CFR 174.5
DI water	64	+4	+85	1.00	0.9	For ultrapure media
Silicone oil	68	-75	+250	0.93	10.3
DI water/propanol mixture	75	-30	+60	0.92	3.6	For ultrapure media
Medicinal white mineral oil	92	-15	+260	0.85	45.3	FDA 21 CFR 172.878, 21 CFR 178.3620(a); USP, EP, SP

Maximum temperature	Maximum oxygen pressure
to 60 °C	50 bar
> 60 °C to 100 °C	30 bar
> 100 °C to 175 °C	25 bar

Diaphragm seal with threaded connection

Description

Special features

1 standard articles of family 990