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Technical information

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Contact surfaces
(Position I and II)

SYNTHETIC CARBONS

A
Antimony-impregnated carbon
B
Resin-impregnated carbon
B2
Resin-impregnated carbon
B3
Pure non-impregnated carbon
B5
Hot pressed carbon

Metals

E
Chromium steel; AISI 420 (1.4021 ; 1.4028)
F1
Nickel-chromium steel; AISI 431 (1.4057)
G
Nickel-chromium-molybdenum steel; AISI 316 (1.4401)
D
Duplex stainless steel (1.4462 ; 1.4162)
Z
Nickel-chromium-molybdenum steatite steel
C
Brass

Carbides

U
Tungsten carbide with welded / inserted nickel
U1
Solid tungsten carbide with nickel
Q1
Sintered silicon carbide with no free silicon
Q2
Sintered silicon carbide
Q6
Sintered silicon carbide with carbon

Ceramic Materials

V
Alumina oxide 99,5%
V2
Alumina oxide 95%
X
Steatite

Synthetic Materials

Y
Glass-filled PTFE
Y1
PTFE-graphite

Secondary seals
(Position III)

ELASTOMERS

P
Nitrile butadiene rubber (NBR)
H
Hydrogenated nitrile butadiene rubber (HNBR)
N
Chloroprene rubber (CR)
E
Ethylene-propylene diene monomer (EPDM)
X
Ethylene-propylene diene monomer peroxide (EPDMPX)
S
Methyl-vinyl silicon rubber (MVQ)
V
Fluorocarbon (FKM or Viton® Rubber)
K
Perfluorocarbon rubber (FFKM)
M
Viton® Rubber coated with PTFE (FEP-FKM / FEP-MVQ)
A
Tetrafluoro-ethylene Propylene Rubber (TFE/P or Aflas®)

NON-ELASTOMERS

G
Graphite
T
PTFE

Springs and other metal parts (position IV and V)

E
Chromium steel; AISI 420 (1.4021; 1.4028)
F
Nickel-chromium steel; AISI 304 (1.4301)
F1
Nickel-chromium steel; AISI 431 (1.4057)
G
Nickel-chromium-molybdenum steel; AISI 316 (1.4401)
G2
AM350 nickel-chromium-molybdenum steel. AM350
L
NIckel-chromium-molybdenum steel; AISI 316L (1.4404)
D
Nickel-chromium-molybdenum duplex stainless steel (1.4462)
M
Hastelloy® C4
M2
Inconel® 718
M3
Alloy® 20
M4
Monel®400
M5
Hastelloy® C276
B
Brass
G4
316Ti (1.4571)

Download the chemical resistance table

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API Plan 23

Circulation of pumped fluids from the discharge to the seal flush connection, passing through a flow rate controller and a heat exchanger.

API Plan 31

Circulation of the pumped fluid from the pump discharge to the seal chamber, passing through a cyclone. Fluids with solids are returned to the suction area.

API Plan 51

Static column of non pressurised fluid inside a tank, through the quench connection.

API Plan 52

Forced circulation of an external non-pressurised fluid used as a barrier fluid.
This fluid is circulated through a pumping ring due to the thermo-siphon effect.

API 53A Plan

Forced circulation through a pumping ring of a barrier fluid in a pressurised tank with a pressure that is 2 bar higher than the product fluid.

API Plan 62

Injection of an external fluid to be used for quenching and flushing/washing. The quench lubricates the seal contact surfaces on the air side, with vapour or water. The flushing/washing operation has a lubricating function.

Download all API plans

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