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1. Description 

 
The SS-

414 is a ‘medium flow’ piston sensed pressure reducing regulator, which incorporates 

a balanced main valve to provide stable control under varying inlet pressures. The regulator 
has the option of a PEEK or PCTFE seat for gas service and Tecasint or ceramic for hydraulic 
service.  
 
These  regulators  can  operate  at  depths  of  up  to  3,000  metres,  either  using  the  external 
seawater  pressure  as  a  reference  pressure  or  working  within  a  sealed  chamber  to  remain 
completely unaffected by outside conditions. 
 
Operating  at  depths  of  up  to  3,000  metres  (10,000ft),  the  SS414  have  been  designed  and 
manufactured specifically to produce the highest standard of results within the challenging 
subsea environment and features NV or SV 1:1 ratio sensor assembly, as standard for sub-sea 
applications and incorporates, the option of the following top works assemblies, dependant 
of the functionality requirements: 

-

 

SR

’ 

- Spring Loaded with Reference to External Sea Water Pressure. 

(*Ref. 6.1.4 for 

Reference Port detail, circled in red)

 

-

 

SS

’ –

 Spring Loaded with Sealed Chamber to remain completely unaffected by the 

external sea water environment conditions. (

Without Reference port

 
Pressure Equipment Directive (PED) 2014/68/EC Declaration 
This equipment is designed and manufactured in accordance with Sound Engineering Practice 
(SEP) Article 4, Paragraph 3 of the directive 2014/68/EC. As such, CE marking must not be 
applied. The equipment is marked under section 3.3 of Essential Safety Requirements of the 
directive. 
 

2. Installation 

 

Before  system  start-up,  it  is  recommended  that  all  lines  should  be  free  from  any  form  of 
contaminations, as those can affect regulator performance and functionality. all systems be 
pressure tested, leak tested and purged with an inert gas such as nitrogen. 

 

Prior to placing into service ensure that the regulator is in the fully closed position, with the 
adjusting mechanism turned completely anti-clockwise. 
 
For  pre-set  regulators  the  supply  pressure  should  be  increased  gradually  and  also  to  be 
mindful that downstream pressure will be present. 

 

Check  the  model  number  reference  to  ensure  that  the  pressure  range  complies  with  the 
installation requirements.  

 

Visually  inspect  the  regulator  for  any  signs  of  damage  or  contamination.  If  any  foreign 
materials are present and cannot be removed from the regulator, or if the threads on the 
regulator appear to be damaged, please contact the office immediately to arrange for the 
regulator to be returned for service. 

 

Summary of Contents for THE SS-414 Series

Page 1: ...1 THE SS 414 SERIES Operating and Service Manual Series includes all variants of SS 414 Issue A March 2020...

Page 2: ...5 Hazardous Location Usage 6 6 Servicing and Maintenance 6 6 1 Servicing the SS 414G 7 6 1 1 Accessing the Main Valve Assembly 7 6 1 2 Accessing the Sensor Assembly NV 9 6 1 3 Accessing the Top Works...

Page 3: ...onditions Without Reference port Pressure Equipment Directive PED 2014 68 EC Declaration This equipment is designed and manufactured in accordance with Sound Engineering Practice SEP Article 4 Paragra...

Page 4: ...into contact with the first thread For MP the correct torque values to be used as specified by fitting manufacturer Any gauge ports on the regulator will be 1 4 NPT unless otherwise stated If any gau...

Page 5: ...peration A reference chamber allows the regulator to respond to the atmospheric conditions during its descent and or ascent at an approx ratio of 1 1 The subsea regulator with reference must be self v...

Page 6: ...rvicing and maintenance work on the SS 414 regulators should only be performed after fully reading and understanding the Operating and Servicing Manual Due to the compressibility of gases the operator...

Page 7: ...socket and use a 7mm socket to turn the Seat Nut 17 anti clockwise v Remove the Seat Nut 17 with O rings 8 12 30 and Soft Seat 21 from the lower main valve assembly vi The Main Valve Pin 18 should be...

Page 8: ...d a 7mm socket on the seat nut hex xv Place the Valve Spring 19 into the Bottom Nut 31 and whilst holding the regulator body 29 upright screw both parts 19 31 into the regulator Body 29 Tighten the bo...

Page 9: ...pliers vii Remove the Sensor 34 from the Sensor Holder 33 by pressing the sensor from the domed top out of the sensor holder viii Replace all O rings 14 16 35 located on the Sensor 34 and Sensor Holde...

Page 10: ...the O rings 7 from around the Adjusting Screw 28 as required prior to reassembly ensuring adequate lubrication is used ix Lift the load spring 24 upper spring rest 29 and ball bearing 28 from the ass...

Page 11: ...4518 0066 24 O RING STD 14 1 OR BS4518 0246 24 O RING STD 15 1 OR BS4518 0416 24 NBR 70 O RING STD 16 1 OR BS4518 0456 24 O RING STD 17 1 PT 300 MF 005 001 SEAT NUT 18 1 PT 305 MF 001 005 MAIN VALVE P...

Page 12: ...aterials Body and Trim 316 SS Seat Gas PEEK or PCTFE Seat Hydraulic Ceramic or Tecasint Flow Capacity Cv 2 0 Leakage Hydraulic Zero drops of water at max inlet Gas Bubble tight 8 Warranty Statement Pr...

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