Universal Gaskets - DIFLEX - Diflon Technology S.R.L.

UNIVERSAL GASKET DIFLEX

gaskets COLORS

INTRODUCTION
DIFLEX is resistant to almost all chemicals, pH 0÷14, acid and strong alkali, solvents, chlorine, catalyzers, liquid gas, vapour, diathermal oils, food, pharmaceutical and petrochemical products, etc.; the only exceptions are melt alkali metals and fluorinated products. See Comparative Table. DIFLEX is recommended for use in the chemical, petrochemical, food, pharmaceutical, cryogenic industries, etc.

• DIFLEX is resistant to high levels of compression, maintaining its elasticity.
• DIFLEX does not absorb moisture.
• DIFLEX does not stick both at high and low temperatures.
• DIFLEX is weatherproof and does not age even in a marine environment.
• DIFLEX is completely acid proof.
• DIFLEX is nontoxical.

Flat Gaskets

Y and M Factors
For environmental protection and health protection reasons, gaskets containing asbestos must be replaced in industries. A valid alternative is represented by universal DIFLEX gaskets. Research and experiments by the DIFLON company have shown that the y and m values of the amiantite gaskets are absolutely compatible with the same values of the DIFLEX gasket, therefore by replacing them during operation, the tightening calculations do not vary; The engineering and maintenance functions in the factories are thus simplified. (Documentation available at the DIFLON technical office). See graphs 1 and 2.

Application Examples
• flat gaskets for flanges of any type, with or without grooves
• profiled flat gaskets, with chamber, for rapid assembly, for exchangers and pressure equipment.
Our exclusive welding technology allows us to provide gaskets with no limits in terms of diameter and shape.
Purity of product for diflex gaskets
DIFLEX can be used, without contra-indications, in the production of basic commodities, since the monomers used for its manufacturing fully comply with EEC 90/128-93/9-92/39 regulations and with title 21, sub-section 177/1550 “Perfluorocarbon resin” of Food and Drug Administration, U.S.A.

Fire resistance of DIFLEX Gaskets
DIFLEX is a barely inflammable material, it has a LOI value of 95, and only burns in atmospheres with an oxygen content of more than 95%. The tests carried out by DIFLON, with the flame directly oriented onto the DIFLEX gasket, gave very good results, even though the material is a polymer.DIFLEX gaskets were adopted for the first time in 1993 by large complexes and since then they have been included among the specifications drawn up by major engineering companies. Field experience shows that DIFLEX gaskets can be used for continuous service at a temperature range of -150°C to +260°C and also under high pressure.

Maximum operating temperature and gasket life at 50 bar

Temperature °C	Min. Duration of the seal.
800	33
450	65
240	illimitato

Strain (%) at 150°C after 100 hours

Diflex Gaskets in Operation
DIFLEX gaskets were adopted for the first time in 1993 by large complexes and since then they have been included among the specifications drawn up by major engineering companies. Field experience shows that DIFLEX gaskets can be used for continuous service at a temperature range of -150°C to +260°C and also under high pressure.

Recommended pxt curve under operating conditions

Gasket life curve (experimental figures)

Versatility of Use
Thanks to their elastic properties, DIFLEX gaskets are suitable for various types of flanges, for example: pipes and fittings made of iron, AISI, iron/PTFE, iron/ENAMEL, CAST IRON, CAST IRON/EBONITE, PVC, MOPLEN, etc.
Practical Remarks
It is very simple to assemble and remove DIFLEX gaskets; DIFLEX gaskets have high shape stability, they are not brittle and they are resistant to shock. After their installation, they perfectly adhere to all surfaces, including uneven ones.

Delivery Conditions

Delivery conditions
PRODUCT COLOUR: Grey or white printed “Diflex - Diflon - Milano”
SHEET SIZE: 1500 x 1500 mm - 1500 x 3000 mm
THICKNESS: 0.5 - 1 - 1.5 - 2 - 3 mm (tolerance: ±10%).
Applications
Acids, Strong alkali, Solvents, Catalyzers, Aromatics, Liquid oxygen, Chlorine, Vapour, etc. Food, Pharmaceutical, Chemical, Petrochemical, Cryogenic industries, etc.
• Operating temperature: -150° + 260° C
• Working pressure at room temperature: 80 bar
• PxT: 12.000 (bar x C°) - pH: 0 ÷ 14
Notes: For lower temperatures, please contact our technical office.

Special Versions

Special Versions
Diflex gaskets are also available in welded versions, even for diameters exceeding 3 m, or according to the customer’s specifications (see page 6). Packaging: packaging poses no problems as the gasket can be folded without the risk of breaking it. Directly available from the warehouse in the standard dimensions shown on page 5.

Diflex Properties

Properties		Test Method	Measure Unit	Values
Density		ASTM D1457	g/cm3	2,24
Permeability 1	- spessore 2 mm - spessore 3 mm	DIN 3535 at 40 bar DIN 3535 at 40 bar	cm3/min. cm3/min.	0,003 0,004
Strain		ASTM D 621	%	6,5
Tensile strength		ASTM F 152 ASTM F 152	Mpa %	>12 450
Creep relaxation	- spessore 2 mm - spessore 3 mm	ASTM F 38B ASTM F 38B	% %	52 68
Compressibility		ASTM F 36	%	16,7
Springback		ASTM F 36	%	40÷50
Heat conductivity factor		DIN 52612	W/M.K.	0,40
Heat conductivity factor
Sealing coeff. m	- thickness 2 mm - thickness 3 mm	ASTM F 586/89 ASTM F 586/89	- -	2,75 2,00
Spec. pressure y	- thickness 2 mm - thickness 3 mm	ASTM F 586/89 ASTM F 586/89	N/mm2 N/mm2	25,5 11,02
Compressive strength 2		60 N/mm2 at 23°C	%	21
Compressive strength 3		30 N/mm2 at 150°C	%	32

Flat Ring Gaskets Dimensions for raised faces flanges

	Raised face flanges - GR - UNI - DIN										Raised face flanges ANSI B16.5 - RF						Inches
	PN 2, 5/6		PN 10		PN 16		PN 25		PN 40		S. 150		S. 300		S. 600		Inches
	d	D	d	D	d	D	d	D	d	D	d	D	d	D	d	D
10	14	39	14	46	14	46	14	46	14	46	-	-	-	-	-	-
15	21	44	21	51	21	51	21	51	21	51	21,4	47,5	21,4	54,0	21,4	54,0	1/2
20	27	54	27	61	27	61	27	61	27	61	27,0	57,2	27,0	66,7	27,0	66,7	3/4
25	33	64	33	71	33	71	33	71	33	71	33,3	66,7	33,3	73,0	33,3	73,0	1
32	42	76	42	82	42	82	42	82	42	82	42,0	76,2	42,0	82,5	42,0	82,5	1 1/4
40	48	86	48	92	48	92	48	92	48	92	48,4	85,7	48,4	95,2	48,4	95,2	1 1/2
50	56	96	56	107	56	107	56	107	56	107	60,3	104,8	60,3	111,1	60,3	111,1	2
65	73	116	73	127	73	127	73	127	73	127	73,0	123,8	73,0	130,2	73,0	130,2	2 1/2
80	89	132	89	142	89	142	89	142	89	142	88,9	136,5	88,9	149,2	88,9	149,2	3
100	114	152	114	162	114	162	114	168	114	168	114,3	174,6	114,3	181,0	114,3	193,7	4
125	141	182	141	192	141	192	141	195	141	195	141,3	196,8	141,3	215,9	141,3	241,3	5
150	168	207	168	218	168	218	168	225	168	225	168,3	222,2	168,3	250,8	168,3	266,7	6
200	219	262	219	273	219	273	219	285	219	290	219,1	279,4	219,1	308,0	219,1	320,7	8
250	273	317	273	328	273	330	273	340	273	352	273,0	339,7	273,0	362,0	273,0	400,0	10
300	324	373	324	378	324	385	324	400	324	417	323,8	409,6	323,8	422,3	323,8	457,2	12
350	356	423	356	438	356	445	356	457	356	474	355,6	450,9	355,6	485,8	355,6	492,1	14
400	406	473	406	490	406	495	406	514	406	546	406,4	514,4	406,4	539,7	406,4	565,1	16
450	457	528	457	540	457	555	457	564	457	571	457,2	549,3	457,2	596,9	457,2	612,8	18
500	508	578	508	595	508	617	508	624	508	628	508,0	606,4	508,0	654,0	508,0	682,6	20
600	610	680	610	695	610	734	610	731	610	747	609,5	717,5	609,5	774,7	609,5	790,6	24
700	711	785	711	810	711	804	711	833	711	852	711,0	831,0	749,0	898,0	721,0	914,0	28
800	813	890	813	917	813	911	813	942	813	974	813,0	939,0	857,0	1006,0	826,0	1022,0	32
900	914	990	914	1017	914	1011	914	1042	914	1084	914,0	1047,0	956,0	1118,0	921,0	1130,0	36
1000	1016	1090	1016	1124	1016	1128	1016	1154	1016	1194	1015,0	1162,0	1015,0	1115,0	1005,0	1155,0	40

Flat Ring Gaskets Dimensions

	Flange ad incam. semplice								Flange ad incam. doppia						pollici
	UNI/DIN				ANSI B16.5				UNI/DIN				ANSI B16.5
	IS				LMF		SMF		ID				LTG
	PN≤6		PN≤10		300÷2500				PN≤6		PN≤10		300÷2500
	d	D	d	D	d	D	d	D	d	D	d	D	d	D
10	14	30	14	34	-	-	-	-	22	30	24	34	-	-
							according to the pipe diameter			35	29	39	25,4	34,9	1/2
20	27	42	27	50	27,0	42,9		23,8	32	42	36	50	33,3	42,9	3/4
25	33	49	33	57	33,3	50,8		30,2	39	49	43	57	38,1	50,8	1
32	42	61	42	65	42,0	63,5		38,1	49	61	51	65	47,5	63,5	1 1/4
40	48	68	48	75	48,4	73,0		44,4	56	68	61	75	54,0	73,0	1 1/2
50	56	81	56	87	60,3	92,0		57,1	69	81	73	87	73,0	92,0	2
65	73	101	73	109	73,0	104,8		68,3	89	101	95	109	85,7	104,8	2 1/2
80	89	117	89	120	88,9	127,0		84,1	103	117	106	120	107,9	127,0	3
100	114	137	114	149	114,3	157,2		109,5	123	137	129	149	131,8	157,2	4
125	141	165	141	175	141,3	185,7		136,5	149	165	155	175	160,3	185,7	5
150	168	192	168	203	168,3	215,9		161,9	176	192	183	203	190,5	215,9	6
200	219	249	219	259	219,1	269,9		212,7	231	249	239	259	238,1	269,9	8
250	273	304	273	312	273,0	323,8		266,7	286	304	292	312	285,7	323,8	10
300	324	354	324	363	323,8	381,0		317,5	336	354	343	363	342,9	381,0	12
350	356	401	356	421	355,6	412,7		349,2	381	401	395	421	374,6	412,7	14
400	406	451	406	473	406,4	469,9		400,0	431	451	447	473	425,4	469,9	16
450	457	505	457	523	457,2	533,4		450,8	481	505	497	523	488,9	533,4	18
500	508	555	508	575	508,0	584,2		501,6	531	555	549	575	533,4	584,2	20
600	610	655	610	675	609,5	692,1		603,2	631	655	649	675	641,3	692,1	24
700	711	760	711	777					736	760	751	777			28
800	813	865	813	882					841	865	856	882			32
900	914	965	914	987					941	965	961	987			36
1000	1016	1062	1016	1091					1036	1062	1061	1091			40

Flat Gaskets that are normally used for equipment

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Address

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24054 - Calcio - BG - Italy

Registered Office

Via Bartolini, 39
20155 - Milano - Italy

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