GESTRA RK 86, RK 86A technology data
GESTRA
Issue Date: 11/04
GESTRA Steam Systems
Non-Return Valve
RK 86, 86A for Flanges PN 10/16/25/40
ASME Class 125/150/300
Description
Wafer-type non-return (check) valve for sandwiching between flanges. Valve with spring for installation in any
position. Without spring only for vertical lines with upward flow. Self-centering valve body. Application for liquids,
gases and vapours (observe classification according to PED).
Pressure/Temperature Rating for valves with metal-to-metal seat¹)
Service temp. °C 20 100 200 300 350 400 500 550 Min. temp.
)
2
pressure
Max. service
1
) For temperatures above 300 °C (572 °F) use a Nimonic spring.
Linear interpolation between pressure and temperature ratings possible.
According to AD 2000, W5 service pressure for 1.4408 must not exceed 300 °C.
2
) Sizing according to ASME 300.
Soft seats (Note pressure/temperature ratings in the above table for metal-to-metal seat.)
EPDM: – 40 to +150 °C for water, condensate and steam.
FPM: –25 to +200 °C for oils, gases and air.
Tightness with soft seats of EPDM and FPM in accordance with DIN 3230, part 3, leakage rates BN 1, BO 1.
Permissible leakage rates with metal-to-metal seat in accordance with DIN 3230, part 3, leakage rates BN 2, BO 3.
Chemical resistance see GESTRA Database “Chemical Resistance”
Connections of wafer-type valves
DIN3) BS 105) ASME JIS6)
EN 1092-1
PN 10/16/ 25/404) B 16.5 Class 150/300 RF 10K
3
) DN 125–200 mm (5–8"): On request form D or E acc. to EN 1092.
4
) DN 15–100 mm (½–4") also suitable for PN 6.
5
) For installation between flanges DN 15 mm (½"), BS 10, table H and J, please use RK 86/86A, DN 20 mm (¾").
6
) As standard for installation between Fl. JIS 10K (except DN 80 mm). When ordering please indicate nominal size (reworking required).
Dimensions
Nominal [mm] 15 20 25 32 40 50 65 80 100 125 150 200
sizes [inch] ½ ¾ 1 1¼ 1½ 2 2½ 3 4 5 6 8
Dimensions
[mm] ∅ D
Class 125/150 194 220 275
PN 10/16 194 220 275
∅ D PN 25 194 226 286
PN 40 194 226 293
Class 300 216 251 308
Weight [kg] 0.27 0.38 0.52 0.8 1.12 1.78 2.43 3.37 5.34 11 14 25
7
) Short overall length according to EN 558-1, series 49 (; DIN 3202, part 3, series K4)
Materials*)
DN 15–100 (¼ – 4") DIN reference ASTM equivalent
Body, seat and
guide ribs
Valve disc, spring retainer
Spring A 313 Type 316
DN 125–200 (5 – 8") DIN reference ASTM equivalent
Body hard faced seat X8CrTi18 1.4502 A 268
Valve cone RK 86 X12Cr13 1.4006 A 182 F6
Guide RK 86 GX8CrNi12 1.4107 A 217-CA15
Guide RK 86 A GX5CrNiMo19-11-2 1.4408 A 351 CF8M
Valve cone RK 86 A X6CrNiMoTi17-12-2 1.4571 A 182 F316
Spring
*) For the use in hygienic installations, foodstuff industry, pharmaceutical industry and similar applications please order RK 86 A
in pickled design.
DN 15 –100 51 46.4 43.9 38.9 36.9 –10°C
RK 86
DN 125 – 200 51 46.4 43.9 38.9 36.9 34.5 –10 °C
RK86A DN 15 –200 49.6 42.3 35.8 31.6 30.4 29.3 27.3 24 –200 °C
Standard valves for fitting between flanges to
Table D, E, F, H, J
B 16.1 Class 125 FF B2238
L7) 16 19 22 28 31.5 40 46 50 60 90 106 140
44 53 64 73 83 96 110 128 151
min
∅ D
67 76 82 93 104 118 136 158 186
max
RK 86 GX4CrNi13-4 1.4317 A 743-CA6-NM
RK 86A GX5CrNiMo19-11-2 1.4408 A 351 CF8M
X6CrNiMoTi17-12-2 1.4571
A182F316
RK 86 GP240GH 1.0619 A 216 WCB
RK 86 A GX5CrNiMo19-11-2 1.4408 A 351CF8M
RK 86 and 86 A
X6CrNiMoTi17-12 -2 1.4571 A313 Type 316
Product Range Group A2
RK 86, RK 86A
L
DN 15–100 mm (½–4")
PN 6/10/16/25/40
Standard design fitted with M8 antistatic connection
Standard design fitted with M8 antistatic connection
ASME Class 125/150/ 300
min
D
D
max
L
DN 125 – 200 mm (5–8")
PN 10/16/25/40
ASME Class 125/150/ 300
∅ D
Non-Return Valve
RK 86, 86A for Flanges
PN 10/16/25/40
ASME Class 125/150/300
Opening pressures
Differential pressures at zero volume flow
DN Opening pressures in mbar
Direction of flow
without with springs
[mm] [in]
15 ½ 2.5 25 22.5 20
20 ¾ 2.5 25 22.5 20
25 1 2.5 25 22.5 20
32 1¼ 3.5 27 23.5 20
40 1½ 4.0 28 24.0 20
50 2 4.5 29 24.5 20
65 2½ 5.0 30 25.0 20
80 3 5.5 31 25.5 20
100 4 6.5 33 26.5 20
125 5 12.0 34 22.0 10
150 6 13.5 37 23.5 10
200 8 16.0 42 26.0 10
1 mbar = 0.0145 psi = 100 mm w.g. = 0.4 in w.g.
On request at extra charge, special springs for opening
pressures:
Between 5 and 1000 mbar for DN 15– 50 mm (½ –2"),
between 5 and 700 mbar for DN 65 and 80 mm (2½, 3"),
between 5 and 500 mbar for DN 100–200 mm (4 –8").
springs
➝➝➝
Enquiry Specification
GESTRA DISCO non-return valve RK 86...
PN 10/16/ 25/40.
Wafer design with extremely short overall length to EN
558-1, series 49.
Suitable for fitting between flanges to DIN, BS or ASME.
Indications on pressure, nominal size (DN), body material.
Metal-to-metal seat or soft seat (EPDM or FPM).
Order Specification
Type RK 86..., DN. ..,
Metal-to-metal or soft seat, EPDM or FPM.
Fluid, flowrate, pressure and temperature. Type of pipe
flanges
Note
The valves should not be used on compressors or where
pulsating flow exists.
For these applications please consult us.
➝
Pressure Drop Chart
The curves given in the chart are valid for water at 20 °C.
To read the pressure drop for other fluids the equivalent
water volume flowrate must be calculated and used in the
graph.
The values indicated in the chart are applicable to springassisted valves with horizontal flow. With vertical flow
insignificant deviations occur only within the range of
partial opening.
When selecting valve please consider:
Partial opening = instable range Full opening = stable range
lmp.
gal/min.
2000
1000
w
˙
Volume flow V
[m³/h]
600
400
300
200
100
60
40
30
20
10
6
4
3
2
1
0.6
0.4
0.3
Pressure drop ∆p
[l/s]
700
100
10
0.2
0.1
0.6
200
100
60
40
30
20
10
6
4
3
2
1
0.4
0.3
1
0.2
0.1
0.06
0.04
0.03
0.02
0.01 0.02 0.03 0.04 0.06 0.1 0.2 0.3 0.4 0.5 bar
0.1 0.2 0.3 0.4 0.6 1 2 3 4 5 6 7 psi
˙
= V˙ ·
V
w
˙
= Equivalent water volume flow
V
w
in l/s or m³/h
ρ = Density of fluid
(operating condition) in kg/m³
V˙= Volume of fluid
(operating condition) in l/s or m³/h
ρ
1000
1 US gallon ; 0.833 Imp. gallon
DN
200
150
125
100
80
65
50
40
32
25
20
15
Supply in accordance with our general terms
of business.
These products comply with the requirements of the EC
Pressure Equipment Directive (PED) 97/23/EC. Classified
for application with fluids of group 1 and 2 (hazardous
and non-hazardous substances). DN 32 – 200 mm with
CE marking. DN 15 – 25 mm are excluded from the
scope of this Directive and not entitled to bear the CE
marking.
ATEX
RK 86, 86A are excluded from the scope of the Directive
94/9/EC (ATEX) and can be used in the potentially
explosive zones (1999/92/EC) 0, 1, 2, 20, 21 and 22.
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