PTFE Coatings

C. Dorabji & Co. presents PTFE Coatings that render coating and lining solution for Chemical, Petrochemical and Pharma Industry. For that, we are positioned among the reliable Manufacturers and Exporters of PTFE Coatings.

We provide :

• Chemical and corrosion resistant
• High temperature linings and coatings
  • PTFE
  • FEP
  • PFA
  • PVDF
  • ETFE
  • ECTF
• Ball Valve
  • Two Piece (As per BS 5351, Short pattern)
  • Three Piece (As per BS 5351, Long pattern)
• Diaphragm Valve
• Butterfly Valve
• Bottom Flush Valve
• NRV & Strainers
• Pipes and Fittings
• Pipes up to 3 m Length
• 45° Elbows
• 90° Elbows
• 4 way Cross
• Concentric Reducer
• Eccentric Reducer
• Equal "TEE"
• Unequal "TEE"
• Reducing "TEE"
• Custom linings
• PTFE Coatings
• PTFE Moulded Articles

Applications :

• Chemical Industry
• Petrochemical Industry
• Pharmaceutical Industry
• Food processing Industry

Selection Guide :

Chemical	Recommended Lining (* indicates both are recommended)	Resistance at Temp. in °C
Acetic Acid	*	B.P.
Acetone	*	B.P.
Ammonia Liquid	*	B.P.
Benzo Nitrile	*	B.P.
Benzyl Alcohol	*	B.P.
Bromine	*	93
n-Butyl Amine	*	149
Butyl Acetate	*	125
Carbon Di Sulfide	*	46
Cetane	*	51
Chlorine	*	93
Chloroform	*	62
Cyclohexene	*	148
Cyclohexanone	*	B. P.
Di butyl phinalene	TFE	260
Di isobutyle	*	B. P.
Dioxane	*	B. P.
Ethyl Acetate	*	B. P.
Ethyl Alcohol	*	204
Ethyl Hexate	*	B. P.
Ethylene Bromide	*	100
Ethylene Glycol	*	204
Gasoline	*	93
Hydrazine	*	B. P.
Hydrochloric Acid	*	B. P.
Hydrofluoric Acid	*	B. P.
Hydrogen Peroxide	*	65
Methyl Ethyl Keton	*	B. P.
Nepthols	*	B. P.
Nitric Acid	*	B. P.
Nitrobenzene	*	B. P.
Nitrogen Tetroxide	*	B. P.
Oils, Vegetables & Animal Fats	TFE	204
Ozone	FEP	25
Perchlorethylene	*	B. P.
Perfluoroxylene	*	B. P.
Phenol	*	B. P.
Phosphoric Acid	*	B. P.
Phosphorous Pentachloride	*	B. P.
Pinene	*	B. P.
Piperidene	*	105
Potassium Hydroxide 60%	*	B. P.
Potassium Permanganate	*	B. P.
Pyridine	*	B. P.
Soaps & Detergents	*	B. P.
Sodium Hydroxide	*	B. P.
Sodium Hypochloride 20%	*	B. P.
Sodium Peroxide	*	B. P.
Solvents, Alipathic & Aromatic	TFE (May cause swelling) FEP	204 / 260
Stannous Chloride	TFE	204
Sulfuric Acid	FEP / PFA	260 / 204
Trichloro Acetic	*	B. P.
Xylene	*	B. P.

Characteristics :

• Advanced Fluoropolymers coatings are virtually inert to most chemicals and solvents
• Fluropolymer lined or coated valves, pipes and fittings, vessels are having dual advantage of strength of steel or metal and life of polymer
• Can withstand reasonably high temperature to meet harsh challenges of an industry
• Environment & ecology friendly

SALIENT FEATURES :
General :

• BODY : C.I. GRADED CASTING - IS 210, GR, 220
• PARTS : C.S., S.S., M.S., EN 8
• BALL : ALUMINIUM
• RATING : ASA 600, ASA 300, ASA 150
• SIZES : 25 NB TO 300 NB
• LINING THICKNESS : 3 mm.
• TEMPERATURE : FOR TEFLON/FEP - 200°C
• WITHSTAND : FOR TEFLON/PFA - 260°C

TESTING :

• SEAT TEST : 10 kg/cm2 (HYDRAULIC)
• BODY TEST : 20 kg/cm2 (HYDRAULIC)
• SPARK TEST : 15 KVDC

Usage :

	FEP	FEP
CHEMICAL RESISTANCE	EXCELLENT	EXCELLENT
SOLVENT RESISTANCE	EXCELLENT	EXCELLENT

Common Solvent Exposure :

Solvent	Exposure in °C	Exposure time	Weight increase %
Acetone	-3.5 10 21	12 Month 12 Month 2 Weeks	0.30 0.40 0
Benzene	25 37 93	96 Hr. 8 Hr. 8 Hr.	0.5 0.6 1.0
Carbon Tetrachloride	3.5 10 21 37 93	12 Month 12 Month 2 Weeks 8 Hr. 8 Hr.	0.6 1.6 1.9 2.5 3.7
Ethyl Alcohol 95%	-3.5 10 21 37 93	12 Month 12 Month 2 Weeks 8 Hr. 8 Hr.	0 0 0 0.1 0.3
Ethyl Acetate	-3.5 10 21	12 Months 12Months 2 Weeks	0.5 0.7 0.7
Toluene	3.5 10 21	12 Months 12 Months 2 Weeks	0.3 0.6 0.6

PFA / FEP Lined Ball Value :

PFA / FEP / PVDF lined ball valves (Globe valves) are made to confirm international standards like BS, ASA and DIN.

Application :

• Petrochemicals
• Chemical
• Pharmaceuticals
• Food Processing

They are available in two designs.

• 2 piece confirming to BS 5351 (Short Pattern)
  • Two piece ball valves are shorter in length and confirms to BS 5351. Short Pattern.
  • In this kind of design stem is integral part of Ball, hence lining on ball is prevented from shear in case of excessive torque.
  • Flanges are drilled according to ANSI B 16.5 or it could be as per customer specifications.
  • All Polycoat valve are coated with high quality, corrosion resistant polyurethane paint.
  • Construction material could be customized to the specific need of the customer.

Dimension Chart :

Size	25	40	50	80	100	150	200	250	300
L	127	165	178	203	229	267	297	330	358
P	270	276	280	285	300	350	360	380	400

Bill Of Material :

Sr. No.	Part Name	Material
1	Center Piece	ASTM A 216 GR WCB
2	Side Piece	ASTM A 216 GR WCB
3	Ball	TEFLON with Metal Core
4	Steam	TEFLON line Carbon Steel
5	Gland	S.S.
6	Seat Ring	PTFE / TEFLON
7	Gland Packing	PTFE / TEFLON
8	Gland Washer	S.S.
9	Cap & Handle	M.S. or S.S.
10	Stud & Nuts	S.S.

Lining Specification :

Lining Material	FEP / PFA / PVDF
Lining Thickness	3 MM All Wetted Parts
Temperature Withstand	FEP : 205°C Max. PFA : 265°C Max.

Test Pressure :

Body	20 kg / cm2
Seat	10 kg / cm2
Spark Test	15 KVDC

• 3 Piece PFA, FEP, PVDF Lined Ball Valves
  • 3 Piece ball valves are classic design, confirming to BS 5351, long pattern.
  • Because stem is not integral part of ball, chances of lining on ball getting sheared increases incase of excessive torque.
  • Flanges are drilled according to ANSI B 16.5 or it could be as per customer specifications.
  • All Polycoat valve are coated with high quality, corrosion resistant polyurethane paint.
  • Construction material could be customized to the specific need of the customer.

Dimension Chart :

Size	25	40	50	80	100
L	127	165	203	241	305
P	270	275	280	285	300

Bill Of Material :

Sr. No	Part Name	Material
1	Center Piece	ASTM A 216 GR WCB
2	Side Piece	ASTM A 216 GR WCB
3	Ball	TEFLON with Metal Core ( Aluminum, SS )
4	Steam	TEFLON Lined Cardon Steel
5	Gland	S.S.
6	Seat Ring	PTFE / TEFLON
7	Gland Packing	PTFE / TEFLON
8	Gland Washer	S.S.
9	Cap & Handle	M.S. or S.S.
10	Stud & Nuts	S.S.

Lining Specification :

Lining Material	FEP / PFA / PVDF
Lining Thickness	3 MM All Wetted Parts
Temperature Withstand	FEP : 205°C Max. PFA : 265°C Max.

Test Pressure :

Body	20 kg / cm2
Seat	10 kg / cm2
Spark Test	15 KVDC

PFA / FEP Lined Diaphragm Valve :

• Neoprene diaphragm with PTFE Lining.
• Specially formulated strong adhesive to bond rubber diaphragm and PTFE lining.
• All wetted parts are lined with 3 mm thick PFA / FEP.
• Corrosion resistant PU coating on outer surfaces.
• Available in sizes from 15 mm (1/2") to 300 mm (12")
• Length of valve confirms to BS 6165

Dimension Chart :

Size	15	20	25	40	50	80	100	150	200	250	300
L	108	117	127	159	190	254	305	408	521	635	749
H	100	110	120	160	200	240	280	315	360	450	520
ØA	70	70	100	140	150	220	240	370	410	510	650

Bill Of Material :

Sr. No.	Part Name	Material
1	Body	ASTM A 216 GR WCB
2	Bonnet	ASTM A 216 GR WCB
3	Spindle	AISI 304/316
4	Compressor	ASTM A 216 GR WCB
5	Collar	Carbon Steel
6	Compressor Pin	AISI 304 / 316
7	Bush	ASTM A 216 GR WCB
8	PTFE Diaphragm backed by Neoprene Rubber	PTFE & NEOPRENE
9	Diaphragm Stud	Brass
10	Handle Wheel	Cast Iron
11	Lock Screw	AISI 304 / 316
12	Stud	AISI 304 / 316
13	Grease Nipple	Brass

Lining Specification :

Lining Material	FEP / PFA / PVDF
Lining Thickness	3 MM All Wetted Parts
Temperature Withstand	FEP : 205°C Max. PFA : 265°C Max.

Test Pressure :

Body	20 kg / cm2
Seat	10 kg / cm2
Spark Test	15 KVDC

PFA / FEP Lined Butterfly Valve
Specifications will be displayed as early as possible.

PFA / FEP Lined Bottom Flush Valve :

PFA/FEP lined Flush bottom or bottom flush or bottom discharge valves are used to flush tanks and are mounted on bottom. PFA/FEP lining renders it corrosion resistance.

Dimension Chart :

Size	A	B	C	D	E	F	G	H	I	J
50 x 25	152	90	40	100	108	25	150	220	50	150
80 x 50	190	127	70	160	152	50	330	430	78	200
100 x 80	230	160	88	220	190	75	400	500	100	200
150 x 100	305	210	140	320	230	100	500	600	150	250

Bill Of Material :

Sr. No.	Part Name	Material
1	Valve Seat	PTFE / TEFLON
2	Spindle	C.S.
3	Body	C.I. Graded Casting, W.C.B. Or S.S.
4	Gland	PTFE / TEFLON
5	Bonnet	C.S.
6	Bolt	S.S.
7	Screw	S.S. / M.S.
8	Wheel	C.S. / M.S.
9	Wheel Nut	Gun Metal

Lining Specification :

Lining Material	TEFLON / FEP
Lining Thickness	3 MM All Wetted Parts
Temperature Withstand	FEP : 205°C Max.

Test Pressure :

Body	20 kg / cm2
Seat	10 kg / cm2
Spark Test	15 KVDC

NRV & Strainers :
Ball Check NRV

• Ball check NRV (non return valve) are available in various sizes from 15 mm (1/2") to 200 mm (8").
• Option for body material in either CI, WCB or SS 150#.
• Flanges are drilled as per ANSI B 16.5 or as per customer specifications.
• All Polycoat valve are coated with high quality, corrosion resistant polyurethane paint.

Dimension Chart :

Nominal Bore inches	Nominal Bore mm.	Lining Thickness (mm)	L (mm)	A (mm)
½	15	3	130	105
¾	20	3	150	115
1	25	3	127	125
1½	40	3	165	160
2	50	3	178	175
3	80	4	203	240
4	100	4	229	270
6	150	5	400	330
8	200	5	600	381

Y' Strainers :

Nominal Bore inches	Nominal Bore mm.	Lining Thickness (mm)	L (mm)	H (mm)
1	25	3	160	93
1¼	32	3	200	120
1½	40	3	200	120
2	50	4	230	145
3	80	4	310	185
4	100	4	350	220

PFA / FEP Lined Pipes and Fittings

FEP / PFA lined pipes and fittings are best suitable for highly corrosive chemicals and petrochemical, pharmaceutical and food processing industry where no metal tubes last longer or plastic pipes are unusable because of higher service temperature and mechanical stress. Lined pipes and fittings meets extreme mechanical requirement and gives excellent performance upto 265°C (509°F).

We can supply wide range of pipes and fittings :

• Pipe upto 3 mtr. (10 feet) length
  • PFA/FEP lined pipes are resistant to most chemicals.
  • Available in wide range of size to meet needs of chemical, petrochemical, pharmaceutical and food processing industry.
  • Available in 25 mm (1") NB to 300 mm (12") NB and length from 100 mm (4") to 3000 mm (120")
  • Pipe material option in C.S. or S.S. as per ASTM A-106 Gr. B
  • Pipe rating option as per Schedule 40 or 20 ( Seamless Pipe )

Dimension Chart :

Nominal Bore inches	Nominal Bore mm.	Lining Thickness (mm)	D (mm)	d (mm)	T (mm)	L (mm) min.	L (mm) max.
1	25	3	108	51	14.5	100	3000
1½	40	3	127	73	17.5	100	3000
2	50	3	152	92	19.5	100	3000
3	80	3	191	127	24	100	3000
4	100	4	229	157	24	100	3000
6	150	5	279	216	25.5	100	2000
8	200	6 - 6.5	343	270	29	100	2000
10	250	7 - 7.5	406	324	30.5	100	1000
12	300	7.5 - 8	483	381	32	100	500

• Pipe body from C.S. or S.S. as per ASTM A-106 Gr. B (Customer specified)
• Pipe rating will be Schedule 40 or 20 (Seamless Pipe) (Customer specified)
• Pipe’s all flanges will be 150#
• Pipe’s all flanges drilled to be ANSI B 16.5 or customer specified.

Lining Specification :

Lining Material	PFA / FEP
Lining Thickness	3 to 8 MM ALL WETTED PARTS
Temperature Withstand	FEP 205°C PFA 265°C

Test Pressure :

PIPE	20 kg / cm2
Spark Test	15 KVDC

• Flanged Concentric reducer, nominal bore 40 x 25 mm (1½" x 1") to 300 x 250 mm (12" x 10")
  Polycoat Flowchem manufacture PFA/FEP lined reducer in two main configuration, viz. Concentric reducer and eccentric reducer. Flanges are drilled to meet ANSI B 16.5.
  
  Reducers are used to connect lines of two unequal sizes.

Dimension Chart :

Nominal Bore inches	Nominal Bore mm.	Lining Thickness	F mm.	D1 mm.	d1 mm.	D2 mm.	d2 mm.	T mm	t mm
1½ x 1	40 x 25	3	114	127	108	73	51	17.5	14.5
2 x 1	50 x 25	3	127	152	108	92	51	19.5	14.5
2 x 1½	50 x 40	3	127	152	127	92	73	19.5	17.5
3 x 1	80 x 25	3	152	191	108	127	51	24	14.5
3 x 1½	80 x 40	3	152	191	127	127	73	24	17.5
3 x 2	80 x 50	4	152	191	152	127	92	24	19.5
4 x 2	100 x 50	4	178	229	152	157	92	24	19.5
4 x 3	100 x 80	4	178	229	191	157	127	24	24
6 x 3	150 x 80	5	229	279	191	216	127	25.5	24
6 x 4	150 x 100	5	229	279	229	216	157	25.5	24
8 x 4	200 x 100	6	279	343	229	270	157	29	24
8 x 6	200 x 150	6.5	279	343	279	270	216	29	25.5
10 x 6	250 x 150	7 - 7.5	305	406	279	324	216	30.5	25.5
10 x 8	250 x 200	7 - 7.5	305	406	343	324	270	30.5	29
12 x 8	300 x 200	7.5 - 8	356	483	343	381	270	32	29
12 x 10	300 x 250	7.5 - 8	356	483	406	381	324	32	30.5

Standard Concentric Reducer confirm to the following :

• Concentric Reducer’s body will be C.I., W.C.B or S.S. 150#.
• Concentric Reducer’s all flanges will be 150#
• Concentric Reducer’s all flanges drilled to be ANSI B 16.5

Lining Specification :

Lining Material	TEFLON / FEP
Lining Thickness	3 to 8 mm. All Wetted Parts
Temperature Withstand	205°C temp. max.

Test Pressure :

Test Pressure	20 kg / cm2
Spark Test	15 KVDC

• Flanged eccentric reducer, nominal bore 40 x 25 mm (1½" x 1") to 300 x 250 mm (12" x 10")

Dimension Chart :

Nominal Bore inches	Nominal Bore mm.	Lining Thickness	F mm.	K	D1 mm.	d1 mm.	D2 mm.	d2 mm.	T mm	t mm
1½ x 1	40 x 25	3	114	7	127	108	73	51	17.5	14.5
2 x 1	50 x 25	3	127	13	152	108	92	51	19.5	14.5
2 x 1½	50 x 40	3	127	7	152	127	92	73	19.5	17.5
3 x 1	80 x 25	3	152	20	191	108	127	51	24	14.5
3 x 1½	80 x 40	3	152	20	191	127	127	73	24	17.5
3 x 2	80 x 50	4	152	15	191	152	127	92	24	19.5
4 x 2	100 x 50	4	178	25	229	152	157	92	24	19.5
4 x 3	100 x 80	4	178	10	229	191	157	127	24	24
6 x 3	150 x 80	5	229	40	279	191	216	127	25.5	24
6 x 4	150 x 100	5	229	25	279	229	216	157	25.5	24
8 x 4	200 x 100	6	279	50	343	229	270	157	29	24
8 x 6	200 x 150	6.5	279	25	343	279	270	216	29	25.5
10 x 6	250 x 150	7 - 7.5	305	50	406	279	324	216	30.5	25.5
10 x 8	250 x 200	7 - 7.5	305	25	406	343	324	270	30.5	29
12 x 8	300 x 200	7.5 - 8	356	50	483	343	381	270	32	29
12 x 10	300 x 250	7.5 - 8	356	25	483	406	381	324	32	30.5

Standard Concentric Reducer confirm to the following :

• Eccentric Reducer’s body will be C.I., W.C.B or S.S. 150#.
• Eccentric Reducer’s all flanges will be 150#
• Eccentric Reducer’s all flanges drilled as per ANSI B 16.5

Lining Specification :

Lining Material	TEFLON / FEP
Lining Thickness	3 to 8 mm. All Wetted Parts
Temperature Withstand	205°C temp. max.

Test Pressure :

Test Pressure	20 kg / cm2
Spark Test	15 KVDC

• PFA / FEP LINED TEE ("T"Connection)
  • Lined Tee connections are available in two configuration, equal and unequal.
  • Lining of PFA or FEP as per customer specifications.
  • Lining thickness of 3mm.
• Equal TEE, nominal bore 25 mm (1") to 300 mm (12")

Dimension Chart :

Nominal Bore inches	Nominal Bore mm.	Lining Thickness	A	D	d	t
1	25	3	89	108	51	14.5
1½	40	3	102	127	73	17.5
2	50	3	114	152	92	19.5
3	80	3	140	191	127	24
4	100	4	165	229	157	24
6	150	5	203	279	216	25.5
8	200	6.5	229	343	270	29
10	250	7.5	279	406	324	30.5
12	300	8.5	305	483	381	32

Standard Tee confirm to the following :

• "Tee" body will be S.S. , W.C.B. or C.I. Class 150#
• "Tee" rating will be Schedule 40 ( Seamless Pipe )
• Tee’s all flanges will be 150#
• Tee’s all flanges drilled to be ANSI B 16.5

Lining Specification :

Lining Material	PFA / FEP
Lining Thickness	3 mm. All Wetted Parts
Temperature Withstand	FEP 205°C temp. max. PFA 205°C temp. max.

Test Pressure :

Test Pressure	20 kg / cm2
Spark Test	15 KVDC

• Reducing (Unequal) TEE, nominal bore 40 x 25 mm (1½" x 1") to 200 x 100 mm (8" x 4")