Beyond Compliance…Towards Excellence

Wheel Operated Stainless Steel Cylinder Valve for Corrosive Gases

ISO 9001 & TPED certified valve manufacturer

 Index

Page
1. Operating Principle & Identifying Features 2
2. Features & Benefits for Best-in-Class Performance 3
3. Material of Construction & Assembly Arrangement 4
4. Product Selection Guide 5
6. List of Approved Gases 6

1.2
 Operating Principle & Identifying Features
Series SSWN-22/V

Identifying features
The handwheel operated packed valve uses non-metallic seat and its sealing mechanism is designed to seal by hand. The design
uses 2 x PTFE spring loaded packing. O-rings provide sealing in case of leakage through packing. The design employs two-piece
spindle in which the non-threaded non-rotating lower spindle is connected by T-slot to the threaded upper spindle. The lower
spindle assembly seals against the seat without rotating which reduces wear and particle generation. This sealing motion and soft
seating allows the valve to be operated using hand torque. Leakage through gland nut threads is eliminated by metallic sealing
with protection provided by O-ring below gland nut thread. Lock nut prevents loosening of gland nut and unscrewing of operating
mechanism.

Recommended opening procedure

The T-slot interface of the upper and lower spindle creates a free play of about 1/4 turn. The handwheel rotates approximately
two turns in anti-clockwise direction from closed to fully open position. It is advisable to open the valve fully and then rotate the
handwheel clockwise about 1/2 turn. This position provides maximum flow and prevents the valve to backseat.

Recommended closing procedure

Close the cylinder valve tightly in clockwise direction using a hand glove.

Valve installation
Valving procedure and torque guidelines should be as per EN ISO 13341.
For NGT threads, we recommend hand tight + 3 turns wrench tight to install the valve in the cylinders.
(Refer https://drive.google.com/file/d/1E0H1B_Z4rBb7ddQJ6R897duZPmFSzHCH/view?usp=sharing)
Valving tools (e.g. sockets or jaws) used to screw the valve into the cylinder must make contact with the flats in the valve body.
The tools should fit the valve properly without causing damage.
Valves should not be over-torqued into the cylinder to avoid high stresses in the cylinder neck, leading to overload failures. Over-
torquing may also lead to irreparable damage to the valve stem.

1. NEVER use wrenches or other persuaders to operate the valve.

2. Proper filling connectors shall be used for filling and discharge ensuring contact only at the intended sealing surface.

2
 Features and Benefits for Best-in-class Performance
Series SSWN-22/V

Powder coated (yellow) durable   Upper spindle designed to shear from

Zamak handwheel failure groove to prevent damage to the
O-ring prevents bobbing of upper spindle  operating mechanism in case excessive
25.4 HEX AF torque is applied
and contamination / moisture ingress
35 HEX AF
Lock nut prevents loosening of gland nut   Lubricated upper spindle ensures smooth
and unscrewing of operating mechanism movement and low torque operation

Upper spindle thread is not in gas wetted   Metallic sealing eliminates need to re-
area to prevent corrosion tighten gland nut. Gland nut O-ring arrests
PVDF tip reduces friction between rotating  leakage if metallic sealing is compromised
upper spindle and lower spindle by impact
FKM O-rings provide sealing over entire  Wrench flat  Self-adjusting, 2 X PTFE spring loaded
operating and storage temperature range 29.5
packing ensure external tightness at normal
service conditions

 Non-threaded, non-rotating lower spindle

ensures no particle shredding in gas wetted
cavity

Dimensions are in mm
Dimensions shown are for BS-6 outlet
a Depends upon outlet connection

Design Specifications
Metric
Minimum life 2000 cycles
Minimum closing torque 6 Nm
Gland nut installation torque 95 ± 3 Nm
Lock nut installation torque 35 ± 2 Nm
Handwheel nut installation torque 9 ± 1 Nm
Maximum test pressure (TP) 250 bar
Lubricant Klubertemp GR M30
Flow coefficient (Cv) 1.1
Valve inherent strength proven up to * 111 kg
* MAX cylinder package mass for which valve can be used without protection

Testing & Certification

• Valves meet EN ISO 10297:2017
• Valves are certified by BAM to European Transportable Pressure Equipment Directive (TPED) & available with mark
• Valves for Indian market are approved by PESO and supplied under Lloyd inspection
• Production testing as per EN ISO 14246

3
 Material of Construction
Series SSWN-22/V

16

17 15

14
11
13
10
12
9
7*
8

6* 5*

4*

3*

2*

1*

* Gas wetted parts

Part list
Part No. Description No. off MATL
1* Valve body 1 SS 316L
Monel spindle with PCTFE or PVDF
2* Lower spindle assembly 1
seat insert and FKM O-ring
3* Packing collar 1 SS 316L
4* Packing 2 PTFE
5* Packing gland O-ring 1 FKM
6* Packing gland 1 SS 303
7* O-ring 1 FKM
8 Belleville spring 3 EN 42
9 Gland nut O-ring 1 FKM
10 Gland nut 1 SS 303
11 Upper spindle assembly 1 SS 303 spindle with PVDF tip blank
12 Upper spindle O-ring 1 FKM
13 Lock nut 1 SS 316L
14 Plain washer 1 SS
15 Spring washer 1 SS
16 Nylock nut 1 SS
17 Handwheel 1 Powder coated (yellow), Zamak

4
 Product Selection Guide – Valve Item Code Matrix
Series SSWN-22/V

. .

Valve series Inlet Connection A Dip Tube Specification

SSW SSWN-22/V 1BS 1" to BS 341-1:1962 X Not required L EN ISO 10297:2017
25E 25E to ISO 11363-1 .

12N 3/4-14 NGT to CGA V-1

Inspection
P "Pi" mark (In house
Body
inspection service)
S6 SS 316L
L “Pi” mark & Lloyds

Pressure rating (in bar) B

150 150 bar
Gas service 200 200 bar
Refer “List of approved 250 250 bar
SJ
gases” (overleaf)

SSW S6 25E X D08 SJ X XX L P F TP 200

(For example only)
. . .

A PRD type PRD rating Seating Test Pressure

Outlet
B06 BS-6 X Not required XX Not required E PCTFE seat insert TP Valve test pressure (TP)
330 CGA 330 . F PVDF seat insert
D08 DIN-8
D14 DIN-14
.

Options
Seal nut with sealing gasket
Chain & keeper ring

A - Other inlet & outlet connections are available as per customer requirement

5
 List of Approved Gases
Series SSWN-22/V

Sl. No. UN No. Name of gas B Chemical formula LC50 ASHRAE No. Condition

01 1741 Boron trichloride BCl3 2541 - A

02 1010 Butadiene-1,2 C4H6 - - -

03 1010 Butadiene-1,3 C4H6 - - -

04 2204 Carbonyl sulphide COS 1700 - A

05 1026 Cyanogen C2N2 350 - A

06 1027 Cyclopropane C3H6 220000 - -

07 1048 Hydrogen bromide HBr 2860 - A

08 1050 Hydrogen chloride HCl 2810 - A

09 1052 Hydrogen fluoride HF 1307 - A

10 2197 Hydrogen iodide HI 2860 - A
11 2035 Trifluoroethane C2H3F3 - R 143a A
12 1085 Vinyl bromide C2H3Br >40000 R140B1 A
13 1086 Vinyl chloride C2H3Cl 150000 R140 A

A – Anhydrous (Water content less than 0.01%)

B - Valve may also be used for mixture of listed gases

Valve shall be fitted with pressure retaining gas-tight plugs or caps having threads that match those of the valve outlets and made of material not
liable to attack by the contents of the pressure receptacle.

6
Tekno Valves
Natun Rasta, Bilkanda, 24 Parganas (N), Kolkata
INDIA
+91 33 25956767
www.teknovalves.com

International Distributors
USA & CANADA MEXICO MALAYSIA
Tekno Valves North America, Inc Refind ING. Roberto Gonzalez Cruz Edificio UNITED AAD SDN BHD
+1 (225) 330 - 6590 +52 (55) 5395 5832 +60 6-679 6223
www.tvnainc.com www.refind.mx www.unitedaad.com

VIETNAM VENEZUELA
Quang Minh Co. Ltd. Suministros Industriales SUINCA C.A.
+024 37737565 + 1 (305) 509-6262
www.quangminhvn.com www.suinca-ca.com
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Last updated: 28th April 2022 P.Halder