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OMS ® WORKHORSE REGULATOR
R-236 owners manual

R-250 High Performance SCUBA Regulator

R-600 Deep Performance SCUBA Regulator

The Workhorse™ unbalanced regulator has been the standard in SCUBA diving for years. Why? Its rugged, simplistic, dependable, low cost design lends itself for use as a primary, recreational, technical and DECO regulator. This 40% Nitrox ready regulator in fact was utilized by the National Park Service as a primary SCUBA regulator in its 190+ foot dive to the B-29 bomber in Lake Mead! The Workhorse™ now comes standard with (1) Black (installed) (1) Green (Oxygen) and (1) Yellow (Nitrox) cover.

Also available as an Octopus with a 40" hose


r236 Workshorse regulator covers

OMS Workshorse SCUBA regulators
Item #Description
R-236CRegulator with piston 1st stage, and non-adjustable 2nd stage with black, green and yellow covers.
R-236DRegulator with Balanced Diaphragm 1st stage (R-251), and non adjustable 2nd stage with black, green and yellow covers.
R-242Workhorse Octopus with 40" hose

  FIRST STAGE SPECIFICATIONS
Item # Description Materials 40% Nitrox Service Intermediate
Pressure
HP
Ports
LP
Ports
Lpm Valve
Interface
R-1Stage-P Unbalanced Piston
Brass Stainless Steel
YES
135 psi
(9.3 bar)
1
3
1950 LPM
300 BAR DIN
    OR
R-251   Balanced Diaphragm
Brass Stainless Steel
YES
140 psi
(9.3 bar)
2
4
1950 LPM
300 BAR DIN
  SECOND STAGE SPECIFICATIONS
Item # Description Materials 40% Nitrox Service Venturi Assist Performance Cover Color  
R-STAGE-B
Downstream
Glass Filled Delrin
Yes
Yes
Medium
3 covers *
Black
Green
Yellow
 
R-242
Octopus w/40" hose
Glass Filled Delrin
Yes
Yes
Medium
Black  
*Item # R236 includes 1st and 2nd stage, hose and (3) colored covers
OVERPRESSURIZATION RELIEF VALVE for 1st Stage LP Port Valve (Optional) SCUBA over-pressure relief valve
R - OPRV
silicone regulator necklace
Item # Description Material Vent Pressure
R - OPRV LP Port OPRV Brass / Stainless
180 psi
(12.4 bar)
  ADAPTER (Optional)
Item # Description Materials
R - 239 Yoke Adapter
Brass / Plastic
  Silicone Regulator Necklace

OMS 1st stage regulators

 
OMS® SECOND STAGE SHUTOFF AND OPRV (S3)    

The S3 when combined with the R-OPRV (sold as a kit only) is a major component in bringing 2nd stage free flows under control.

The diver by actuating the black slide on the S3 can positively shutoff a free flowing 2nd stage and continue to dive switching to the redundant regulator (on a set of doubles) or an alternate air source. The R-OPRV is installed in one of the LP ports in the first stage, is mandatory as it vents excess pressure buildup between the second and first stages and prevents hose failure.
2nd stage shutoff
Item #

R-S3-K
Description

Second Stage Shutoff
and OPRV

OMS ® HIGH PERFORMANCE REGULATORS

Workhorse Regulators 
Deep Performance Regulators
OMS® R-250 REGULATOR       R-250 owners manual

The new OMS® R-250 (40% Nitrox ready) 2nd stage features an adjustment knob for increased air flow and a Venturi assist for excellent WOB (work of breathing). The 40% Nitrox ready first stage incorporates a balanced diaphragm design that offers high performance and is clearly the choice for cold and/or contaminated water. The first stage is designed for vertical or horizontal positioning and with the (2) HP and (4) LP ports, many hose configurations are possible. Also available as an OCTOPUS with a 40” hose.

Also available as an Octopus with a 40" hose


r250 high performance regulator covers
OMS High Performance SCUBA regulator

r251 1st stage
R-251   Balanced diaphragm first stage
Item #Description
R-250Regulator with balanced diaphragm 1st stage, adjustable 2nd stage and black, yellow and green covers.
R-246High Performance Octopus with 40" hose


  FIRST STAGE SPECIFICATIONS
Item # Description Materials O-Rings / Grease Intermediate
Pressure
HP
Ports
LP
Ports
Lpm @
3000 psi
Valve
Interface
R - 251   Balanced Diaphragm
Brass Stainless Steel
Viton / O2 Grease
135 psi
(9.3 bar)
2
4
1950 LPM
300 BAR DIN
  SECOND STAGE SPECIFICATIONS
Item # Description Materials O-Rings / Grease Venturi Assist Performance Cover Color
R 249
Adjustable Downstream
Glass Filled Delrin
Viton / O2 Grease
Yes
High
Yellow
Green
Black
R 246 OCTOPUS with 40" (101.6cm) hose
Black
* Item # R-250 includes Hose, 1st stage, 2nd stage and 3 colored covers
OVERPRESSURIZATION RELIEF VALVE for 1st Stage LP Port Valve (Optional) OMS SCUBA OPRV
R - OPRV
silicone regulator necklace
Item # Description Material Vent Pressure
R - OPRV
ROPRV
LP Port OPRV Brass / Stainless
180 psi
(12.4 bar)
  ADAPTER (Optional) Yoke Adapter
Item # Description Materials
R - 239 Yoke Adapter
Brass / Plastic
  Silicone Regulator Necklace

 
R-600 Owners Manual
Workhorse Regulators           High Performance Regulators
OMS® DEEP PERFORMANCE REGULATOR

The new OMS® Deep Performance™ regulators (R-600 and R-601) recently underwent extensive testing using a certified ANSTI simulator to demonstrate that they perform as well or better than many technical regulators at depth. The performance of OMS® Deep Performance regulators were tested using both US NAVY and EN-250 test parameters. At the extreme with a 1200 psi supply pressure and the breathing simulator ramped up to 75 lpm, the OMS® regulators (R-600 and R-601) stayed well under the 2.0 J/L limit as they screamed past the 300 FSW mark until the chamber reached its max. depth of 329 FSW. At this depth the OMS® Deep Performance regulator was still delivering a breathing performance at a flat 2.0 J/L! *Results of the testing showed that the R-600/601 regulators are highly recommended for overall work of breathing performance at depths to 329 FSW. At the Navy’s maximum depth limit for open circuit SCUBA (198 FSW), these regulators are capable of performing at work rates (62.5 RMV) far above the Navy’s minimum 22.5 RMV requirement. The R-601 tested with similar results.

Second stage can be configured for use on divers right or divers left.

R600 Deep Performance SCUBA Regulator
R-600     Deep Performance Regulator with Adjustment Knob and Venturi Control
R600 1st stage
DEEP PERFORMANCE REGULATORS Item #’s R-600 and R-601
FIRST STAGE SPECIFICATIONS Item # R-600 Item # R-601
Design Balanced Diaphragm Balanced Diaphragm
Material Brass / Stainless Brass / Stainless
Environmental seal YES NO
Hose configuration Fixed Ports Fixed Ports
Low pressure ports 4 4
High pressure ports 2 2
DIN to Yoke Adapter Included Included
SECOND STAGE SPECIFICATIONS Item # R-600 Item # R-601
Design Pneumatically balanced Pneumatically balanced
Flow Adjustment Adjustable flow knob NO
Free flow control "NO FREE FLOW" purge cover "NO FREE FLOW" purge cover
Venturi control YES YES
Regulator Body Material Glass filled thermoplastic Glass filled thermoplastic
W.O.B. W.O.B. < .9 J/L W.O.B. < .9 J/L
Hose configuration Divers Left or Right Divers Right
R251 1st stage regulator R601 2nd stage regulator
Item #     Description Item #     Description
R-251     Balanced diaphragm first stage R-251     Deep Performance Regulator with Venturi Control,
    no adjustment knob


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