Rimco Overseas

Additional Information:

• Delivery Time: READY STOCK

• Size: ½” up to 36“ (DN15 up to Dn900)
• 
  
• Pressure Rating: ASME 150# to 2500#
• 
  
• Materials: Carbon Steels, Low Temperature Carbon Steel, Martensitic Steels, Austenitic Stainless Steel, Duplex Stainless Steels, Super Duplex Stainless Steels, Nickel Alloys, Nickel Aluminum Bronze, Hastelloy, Inconnel, Titanium Alloy & Carbon Steel with Internal CorrosionResistant Alloy (CRA) Overlay
• 
  
• Design Standard: API6D, API 599, BS 5353, MESC SPE 77/107
• 
  
• Pressure / Temperature Rating: ASME B 16.34
• 
  
• Test (Inspection) Standard: API 598, API 6D, MESC 77/107, ISO 5208
• 
  
• Construction Details: Inverted Plug Pressure Balanced /Lubricated
• 
  
• End Connection: Screwed, Socket Weld, Flanged, Hub End, Butt-Weld
• 
  
• Operator / Actuator: Lever, Gear, Actuator (Pneumatic, Hydraulic, Electro-Hydraulic and Electric Motorised)

Plug Valves are available in three different types versions
• Full Bore
• Regular Bore
• Extended Stem Valves

Additional Information:

• Delivery Time: READY STOCK

SIZE AVAILABLE : ½" X ¾ " TO 16" X 18"

END CONNECTION : Screwed, Flanged End Safety Relief Valves, Safety Relief Valves

WIDELY USED FOR : Steam Boilers, Steam Services, Compressors, Receivers, Burners, Dryers and other Piping Systems and Many More.

Additional Information:

• Delivery Time: READY STOCK

• Application

  Isolation

• Features / Benefit

  Lift Type Design Welded & Renewable Seat Rings

• Ansi Class / Rating

  800#, 1500# , 2500#

• Design Standard

  BS 5352

• Testing Standard

  ISO 5208

• Size

  15 mm to 50 mm

• Materials

  Body : A105, F11, F22, LF2, F304, F304L, F316, F316L
  Trim : 13 % Cr, Stellite etc

• Ends

  Screwed End, Socket Weld End, Butt Weld End

• Operation

  Manual

Additional Information:

• Delivery Time: Ready Stock

Also known as UNS N04400 and UNS N05500, these valves can be customized in terms of thicknesses and sizes as per the specific requirements of our clients.

Additional Information:

• Delivery Time: READY STOCK

Additional Information:

• Delivery Time: READY STOCK

Additional Information:

• Delivery Time: READY STOCK

• STANDARDS : API 600/BS1414, API 598/BS EN 12266-1, ASME B 16.10, ASME B 16.5, ASME B 16.25, ASME B 16.34
• SIZE : 1/8” to 16”
• RATING : 150#,300#,600#,800#,1500#.
• PRESSURE RATING : 150#,300#,600#,800#,1500#.
• END CONNECTION : Screwed [NPT], Socket Weld, Flanged End, Screwed Parallel, Screwed Taper
• As exporters, we ship ASTM, BS, UNS, AFNOR and JIS standard compliant Inconel 600 Globe Valves, Inconel 600 Needle Valves, etc. to the pulp and paper and food processing industry.

Delivery Condition : Annealed and Pickled, Polished, Bright Annealed, Cold Drawn

Inspection, Test Reports : Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports, Destructive Test Report, Non Destructive Test Reports

Also referred as WNR 2.4816, WNR 2.4851, WNR 2.4856 and WNR 2.4668, we offer the same in quite reasonable rates to our esteemed clients

Additional Information:

• Delivery Time: READY STOCK

• STANDARDS : API 600/BS1414, API 598/BS EN 12266-1, ASME B 16.10, ASME B 16.5, ASME B 16.25, ASME B 16.34
• SIZE : 1/8” to 16”
• RATING : 150#,300#,600#,800#,1500#.
• PRESSURE RATING : 150#,300#,600#,800#,1500#.
• END CONNECTION : Screwed [NPT], Socket Weld, Flanged End, Screwed Parallel, Screwed Taper
• As exporters, we ship ASTM, BS, UNS, AFNOR and JIS standard compliant Titanium Valves, brass spring check valve, 3 inch brass check valve, brass non return valve price list, 1/2 inch inline check valve, check valve manufacturers in india, brass gate valve, brass gate valve price list, brass gate valve, etc. to the pulp and paper and food processing industry.

• Dimension : API602, ASME B1.20.1, ASME B16.11, ASME B16.5, API598
• Specification : ASTM B381 / B367 / ASME SB381 / SB367
• Size : DN15~50, NPS 1/2″~24″
• Pressure rating : PN1.0Mpa~PN420MPa,Class150~2500
• End Connection : Screwed [NPT], Socket Weld, Flanged End, Screwed Parallel, Screwed Taper
• Titanium Grades : Ti GR I, GR -2, GR-3, GR-4, GR-5, GR-7

• Design & Manufacture according to : BS 1868
• Face to Face according to : ASME B16.10
• Flange Dimensions according to : ASME B16.5
• Pressure & Temperature according to : ASME B16.34
• Test & Inspection according to : API 6D / API 598
• Visual Inspection according to : MSS SP-55
• Marking according to : MSS SP-25

Additional Information:

• Delivery Time: READY STOCK

Additional Information:

• Delivery Time: READY STOCK

• Wafer type - PW dual-plate check valvesSize range(s)NPS 2 - 60
  (DN 50 - 1500)Pressure rating
  ASME Classes
  150 - 2500Standard connectionsWafer
• Solid Lug type - PL, PM, dual plate check valvesSize range(s)NPS 2 - 24
  (DN 50 - 600)Pressure rating
  ASME Classes
  150 - 2500Standard connectionsLug
• 
  
• Double flanged type - PF, PG dual plate check valve
• Size range(s)NPS 12 - 60
  (DN 300 - 1500)Pressure rating
  ASME Classes
  150 - 900Standard connectionsFlanged
• Hub end type - PH dual plate check valveSize range(s)NPS 2 - 24
  (DN 50 - 600)Pressure rating
  ASME Classes
  600 - 2500Standard connectionsHub
• 
  
• Butt weld end type - PZ dual plate check valveSize range(s)NPS 3 - 36
  (DN 80 - 900)Pressure rating
  ASME Classes
  150 - 600Standard connectionsButt weld

Additional Information:

• Delivery Time: READY STOCK

1. Body and Bonnet  : ASTM A 216 GR WCB / ASTM A 351 GR CF8 / CF8M / CF3 / CF3M
2. Trims : ASTM A 351 GR CF8 / CF8M / CF3 / CF3M
3. Seat : PTFE
4. Fasteners : SS 304 / SS 316
5. Handle :  SS 304 / SS 316 / Carbon Steel

Specification of Needle Valves

• Size – 6NB to 25Nb
• End connection : NPT, BSPT, Socket Weld , Butt Weld, Tube Fitting With Straight and angle pattern
• Working Pressure : 3000, 6000 & 10000 PSIG
• Temperature rating : PTFE 232ºC / Grafoil 371ºC
• Material : S.S.316,S.S.304, C.S, F11
• Packing : PTFE, Grafoil, Panel Mounting on request
• All valves are 100% factory Tested at 10000 PSIG
• Lubrication : Day molly Sulphide

Additional Information:

• Delivery Time: READY STOCK

• Application

  Inflammable , Explosive , Poisonous , Precious media

• Features / Benefit

  OS & Y Construction , Zero Leakage Valve , Double Seal Design

• Ansi Class / Rating

  150# , 300# , 800#

• Design Standard

  ISO 15761

• Testing Standard

  API 598/602

• Size

  15 to 50MM

• Materials

  A105 , F304 , F316

• Ends

  Screwed End , Socket Weld End , Butt Weld End

• Operation

  Manual

Additional Information:

• Delivery Time: READY STOCK

• Application

  Isolation

• Features / Benefit

  Full Bore, Reduce Bore, Regular Bore
  Blow Out Proof Stem
  Low Torque
  Floating Ball
  Mounting Pad on request

• Ansi Class / Rating

  600# , 800#

• Design Standard

  BS EN ISO 17292

• Testing Standard

  API 598

• Size

  15 mm to 50 mm

• Materials

  Body : A105, WCB, CF8, CF8M, Hast Alloy, Super Duplex, Alloy 20 , LCB etc 
  Seat : PTFE , reinforced PTFE, Nylon, etc

• Ends

  Screwed End, Socket Weld End

• Operation

  Manual

Additional Information:

• Delivery Time: READY STOCK

• Application

  Isolation

• Features / Benefit

  Lift Type Design Welded & Renewable Seat Rings

• Ansi Class / Rating

  800#, 1500# , 2500#

• Design Standard

  BS 5352

• Testing Standard

  ISO 5208

• Size

  15 mm to 50 mm

• Materials

  Body : A105, F11, F22, LF2, F304, F304L, F316, F316L
  Trim : 13 % Cr, Stellite etc

• Ends

  Screwed End, Socket Weld End, Butt Weld End

• Operation

  Manual

Additional Information:

• Delivery Time: READY STOCK

• Size : 1¼” (32mm) to 20″ (500mm)
• Connection : Wafer – Between PN10/16 Flanges
• Fluids : Air – Inert Gas – Oil – Seawater – Steam – Water
• Installation : Horizontal  & Vertical (with flow upwards)

Additional Information:

• Delivery Time: READY STOCK

Additional Information:

• Delivery Time: READY STOCK

Additional Information:

• Delivery Time: READY STOCK

• Application

  Steam , Thermic Fluids , Acids , Gases , Vacuum and other Critical media

• Features / Benefit

  Seatless , Glandless , Renewable Sealing Ring

• Ansi Class / Rating

  800#

• Design Standard

  API 602

• Testing Standard

  API 598

• Size

  15 to 40 MM

• Materials

  A105 , F304 , F316

• Ends

  Screwed End , Socket Weld End , Butt Weld End

• Operation

  Manual

Additional Information:

• Delivery Time: READY STOCK

• Application

  Throttling

• Features / Benefit

  OS & Y Construction Welded & Renewable Seat Rings Pressure Seal Welded Bonnet on request for High Pressure

• Ansi Class / Rating

  800#, 1500# , 2500#

• Design Standard

  BS 5352

• Testing Standard

  ISO 5208

• Size

  15 mm to 50 mm

• Materials

  Body : A105, F11, F22, LF2, F304, F304L, F316, F316L
  Trim : 13 % Cr, Stellite etc

• Ends

  Screwed End, Socket Weld End, Butt Weld End, Flange End

• Operation

  Manual

Additional Information:

• Delivery Time: READY STOCK

• Sleeved Plug Valve

• Size: ½” up to 36“ (DN15 up to Dn900)
• 
  
• Pressure Rating: ASME 150# to 2500#
• 
  
• Materials: Carbon Steels, Low Temperature Carbon Steel, Martensitic Steels, Austenitic Stainless Steel, Duplex Stainless Steels, Super Duplex Stainless Steels, Nickel Alloys, Nickel Aluminum Bronze, Hastelloy, Inconnel, Titanium Alloy & Carbon Steel with Internal CorrosionResistant Alloy (CRA) Overlay
• 
  
• Design Standard: API6D, API 599, BS 5353, MESC SPE 77/107
• 
  
• Pressure / Temperature Rating: ASME B 16.34
• 
  
• Test (Inspection) Standard: API 598, API 6D, MESC 77/107, ISO 5208
• 
  
• Construction Details: Inverted Plug Pressure Balanced /Lubricated
• 
  
• End Connection: Screwed, Socket Weld, Flanged, Hub End, Butt-Weld
• 
  
• Operator / Actuator: Lever, Gear, Actuator (Pneumatic, Hydraulic, Electro-Hydraulic and Electric Motorised)

Plug Valves are available in three different types versions
• Full Bore
• Regular Bore
• Extended Stem Valves

Additional Information:

• Delivery Time: READY STOCK

• Two-Way Directional Valve

A two-way directional valve passes air in two directions, through two ports which can be open or closed. If the valve ports are closed no air can flow through the valve. If the ports are open, air may move from the first port through the valve and through the second port or in the opposite direction.

• Three-Way Directional Valve

A three-way directional valve has three ports, each of which serves a different purpose. The first port is used to connect the valve to an actuator or another device. The second port is connected to an air-flow. The third port is used as an exhaust exit. When the first and second ports are open and the third is closed, air moves through the valve to the device. When the first and third ports are open and the second port is closed, the actuator can vent exhaust.  Three-way valves are often connected to actuators in cylinders, or used in pairs and connected to double-acting cylinders.

• Four-Way Directional Valves

A four-way directional valve has four distinct ports, two of which connect to actuators, one that connects to a pressurized air-flow, and one that serves as an exhaust pathway. They are among the most common types of valves found in pneumatic systems because the four distinct paths allow the valve to effectively reverse the motion of a motor or basic cylinder. An additional port is sometimes added to a four-way valve, making it a five-ported four-way valve. A four-way valve with an additional port is often used to provide dual pressure, meaning the valve can apply one of two kinds of pressure and alternate between the two depending on what the application requires. Alternatively, the valve can use the other port as a secondary exhaust port.

• Spring Offset

This type of pneumatic valve classification refers to the manner in which air-flow direction is switched. For example, in a two-way directional valve, the valve is either open (air-flow is enabled) or closed (air-flow is prevented). In order for each port to assume an open or close position, an actuator moves a valve spool into position. To release the valve spool and return the pneumatic valve to its previous position, a spring releases the spool. A two-way directional valve that functions in this manner is also called a spring offset valve.

• Resting state: Open v. Closed

In two-way directional spring offset valves, there are two positions they can assume when the connected actuator isn’t active: open or closed. In devices where an open resting position is standard, air moves freely through the valve. In a closed resting state, the air-flow is blocked. In three-way valves, one port is always open. In such cases, a closed resting state usually results in blocking the air-flow port, so pressure isn’t moving unless the device is turned on. 

Additional Information:

• Delivery Time: READY STOCK

• Application

  Isolation

• Features / Benefit

  Lift Type Design Welded & Renewable Seat Rings

• Ansi Class / Rating

  800#, 1500# , 2500#

• Design Standard

  BS 5352

• Testing Standard

  ISO 5208

• Size

  15 mm to 50 mm

• Materials

  Body : A105, F11, F22, LF2, F304, F304L, F316, F316L
  Trim : 13 % Cr, Stellite etc

• Ends

  Screwed End, Socket Weld End, Butt Weld End

• Operation

  Manual

• Application

  Isolation

• Features / Benefit

  Lift Type Design Welded & Renewable Seat Rings

• Ansi Class / Rating

  800#, 1500# , 2500#

• Design Standard

  BS 5352

• Testing Standard

  ISO 5208

• Size

  15 mm to 50 mm

• Materials

  Body : A105, F11, F22, LF2, F304, F304L, F316, F316L
  Trim : 13 % Cr, Stellite etc

• Ends

  Screwed End, Socket Weld End, Butt Weld End

• Operation

  Manual

• Application

  Isolation

• Features / Benefit

  Lift Type Design Welded & Renewable Seat Rings

• Ansi Class / Rating

  800#, 1500# , 2500#

• Design Standard

  BS 5352

• Testing Standard

  ISO 5208

• Size

  15 mm to 50 mm

• Materials

  Body : A105, F11, F22, LF2, F304, F304L, F316, F316L
  Trim : 13 % Cr, Stellite etc

• Ends

  Screwed End, Socket Weld End, Butt Weld End

• Operation

  Manual

• Application

  Isolation

• Features / Benefit

  Lift Type Design Welded & Renewable Seat Rings

• Ansi Class / Rating

  800#, 1500# , 2500#

• Design Standard

  BS 5352

• Testing Standard

  ISO 5208

• Size

  15 mm to 50 mm

• Materials

  Body : A105, F11, F22, LF2, F304, F304L, F316, F316L
  Trim : 13 % Cr, Stellite etc

• Ends

  Screwed End, Socket Weld End, Butt Weld End

• Operation

  Manual

• Application

  Isolation

• Features / Benefit

  Lift Type Design Welded & Renewable Seat Rings

• Ansi Class / Rating

  800#, 1500# , 2500#

• Design Standard

  BS 5352

• Testing Standard

  ISO 5208

• Size

  15 mm to 50 mm

• Materials

  Body : A105, F11, F22, LF2, F304, F304L, F316, F316L
  Trim : 13 % Cr, Stellite etc

• Ends

  Screwed End, Socket Weld End, Butt Weld End

• Operation

  Manual

• Application

  Isolation

• Features / Benefit

  Lift Type Design Welded & Renewable Seat Rings

• Ansi Class / Rating

  800#, 1500# , 2500#

• Design Standard

  BS 5352

• Testing Standard

  ISO 5208

• Size

  15 mm to 50 mm

• Materials

  Body : A105, F11, F22, LF2, F304, F304L, F316, F316L
  Trim : 13 % Cr, Stellite etc

• Ends

  Screwed End, Socket Weld End, Butt Weld End

• Operation

  Manual

• Application

  Isolation

• Features / Benefit

  Lift Type Design Welded & Renewable Seat Rings

• Ansi Class / Rating

  800#, 1500# , 2500#

• Design Standard

  BS 5352

• Testing Standard

  ISO 5208

• Size

  15 mm to 50 mm

• Materials

  Body : A105, F11, F22, LF2, F304, F304L, F316, F316L
  Trim : 13 % Cr, Stellite etc

• Ends

  Screwed End, Socket Weld End, Butt Weld End

• Operation

  Manual

• Application

  Isolation

• Features / Benefit

  Lift Type Design Welded & Renewable Seat Rings

• Ansi Class / Rating

  800#, 1500# , 2500#

• Design Standard

  BS 5352

• Testing Standard

  ISO 5208

• Size

  15 mm to 50 mm

• Materials

  Body : A105, F11, F22, LF2, F304, F304L, F316, F316L
  Trim : 13 % Cr, Stellite etc

• Ends

  Screwed End, Socket Weld End, Butt Weld End

• Operation

  Manual

• 1/2" - 4" IPS FPT
• Class 125 Stainless Steel (304 or 316)
• 1000psi Working Pressure
• Reinforced PTFE Seal

SIZES:  1/2” - 3/4” - 1” - 1-1/4” - 1-1/2” - 2” - 2-1/2” - 3” - 4”
VALVE BODY:  Class 125, 304 Stainless Steel (316 Series - Special Order)
BALL: Chrome Plated 304 Stainless Steel (316 Series - Special Order)
SEAT RING:  Reinforced PTFE
WORKING PRESSURE:  1000 PSI
INSTALLATION:  Per IPS Pipe Standards

• Temperature Rating : PTFE 450F,(232C)/ Grafoil 700 F(371C)
• Specification : ASTM A351 / A494 & ASME SA351 / SA494
• End Connection : Male and Female NPT, BSPT, Socket Weld (SW) or Dual Ferrule Tube Connections, Male to Female
• Flow Pattern : Straight/ Angle
• Connection : Thread, Weld or Tube End

Additional Information:

• Delivery Time: READY STOCK

• Standard :API 600/BS1414, API 598/BS EN 12266-1, ASME B 16.10, ASME B 16.5, ASME B 16.25, ASME B 16.34
• Bolt / Screw Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
• Size : 1/8 to 24 ” or Custom Sizes
• Working Pressure : Up to 6000 PSIG, valves are also available that can handle higher pressure
• End Connection : Male and Female NPT, BSPT, Socket Weld (SW) or Dual Ferrule Tube Connections, Male to Female, Female to Female
• Temperature Rating : PTFE 450F,(232C)/Grafoil 700 F(371C)
• Pressure rating : 150#,300#,600#,800#,1500#

Additional Information:

• Delivery Time: READY STOCK

• sizes -15 mm to 600 mm ( upto 800#)
• end connections -flanged to bs,ansi,/din ,screwed , swe. ,bwe
• sizes - 15mmto 2000mm.
• end connections -flanged to bs,ansi,/din ,screwed , swe. ,bwe
• materials -ci , cs, cf8,cf8m,higher alloys / fabricated version ( for sizes 100nb & above )

• y-type strainers
• a/ca series cast iron strainers
• b series cast carbon steel (wcb) strainers
• c series cast chrome moly steel (wc6) strainers
• d series forged steel (f22) strainer
• e series cast stainless steel (cf8m) strainers
• f series cast bronze strainers

Additional Information:

• Delivery Time: READY STOCK

• Application

  Isolation

• Features / Benefit

  Lift Type Design Welded & Renewable Seat Rings

• Ansi Class / Rating

  800#, 1500# , 2500#

• Design Standard

  BS 5352

• Testing Standard

  ISO 5208

• Size

  15 mm to 50 mm

• Materials

  Body : A105, F11, F22, LF2, F304, F304L, F316, F316L
  Trim : 13 % Cr, Stellite etc

• Ends

  Screwed End, Socket Weld End, Butt Weld End

• Operation

  Manual

• Application

  Isolation

• Features / Benefit

  Lift Type Design Welded & Renewable Seat Rings

• Ansi Class / Rating

  800#, 1500# , 2500#

• Design Standard

  BS 5352

• Testing Standard

  ISO 5208

• Size

  15 mm to 50 mm

• Materials

  Body : A105, F11, F22, LF2, F304, F304L, F316, F316L
  Trim : 13 % Cr, Stellite etc

• Ends

  Screwed End, Socket Weld End, Butt Weld End

• Operation

  Manual

• Application

  Isolation

• Features / Benefit

  Lift Type Design Welded & Renewable Seat Rings

• Ansi Class / Rating

  800#, 1500# , 2500#

• Design Standard

  BS 5352

• Testing Standard

  ISO 5208

• Size

  15 mm to 50 mm

• Materials

  Body : A105, F11, F22, LF2, F304, F304L, F316, F316L
  Trim : 13 % Cr, Stellite etc

• Ends

  Screwed End, Socket Weld End, Butt Weld End

• Operation

  Manual

Additional Information:

• Delivery Time: READY STOCK

• Nickel (Ni) 5%
• Molybdenum (Mo) 2.5% – 3.5%
• Sometimes Copper (Cu) 1% max

• UNS J92205

• UNS S31803, SAF2205, Alloy 2205, DIN 1.4462
• 4A ASTM A890, A995

• Tensile 620 min N/mm2
• Yield 415 min N/mm2
• Elongation 25%
• Hardness 185 HB typ
• Density 7.8 g/cm3
• P/T ratings, typically B16.34 group 2.8 =20 bar class 150 (UNS S32570)

• Good for sea water service
• Especially good for:
  • General corrosion
  • Erosion /corrosion
  • Stress corrosion cracking
  • Corrosion fatigue
• Poor fouling resistance

Additional Information:

• Delivery Time: READY STOCK

• STANDARDS : API 600/BS1414, API 598/BS EN 12266-1, ASME B 16.10, ASME B 16.5, ASME B 16.25, ASME B 16.34
• SIZE : 1/8” to 16”
• RATING : 150#,300#,600#,800#,1500#.
• PRESSURE RATING : 150#,300#,600#,800#,1500#.
• END CONNECTION : Screwed [NPT], Socket Weld, Flanged End, Screwed Parallel, Screwed Taper
• Grade : Hastelloy C276 (UNS No. N10276), Hastelloy C22 (UNS No. N06022), Hastelloy B2 (UNS No. N10665), Hastelloy C-4 (UNS No. N06455)
• As exporters, we ship ASTM, BS, UNS, AFNOR and JIS standard compliant Hastelloy C276 / C22 / B2 Valves, Hastelloy C276 / C22 / B2 Needle Valves, etc. to the pulp and paper and food processing industry.

Delivery Condition : Annealed and Pickled, Polished, Bright Annealed, Cold Drawn

Inspection, Test Reports : Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports, Destructive Test Report, Non Destructive Test Reports

Hastelloy C276 Ball Valves
Hastelloy C22 Globe Valves
Hastelloy Trunnion Mounted Ball Valves
Hastelloy 2.4819 Forged Swing Check Valves
Hastelloy B2 Oxygen Services Valves
Hastelloy C276 Butterfly Valves
Hastelloy 2.4602 Fugitive Emission Valves
Hastelloy C276 Gate Valves
Hastelloy C22 Check Valves
Hastelloy 2.4617 Cryogenic Valves
Hastelloy C276 Pressure Seal Valves
Hastelloy B2 Nuclear Valves
Hastelloy C276 Plug Valves

Additional Information:

• Delivery Time: READY STOCK

Additional Information:

• Delivery Time: READY STOCK