Advanced Specialty Gas Equipment

Brass Single-Stage Regulator Model SSD

Models SSD, SSE

General Purpose, Single-Stage Regulators

General purpose single-stage regulators are designed for use in noncorrosive gas service. They are recommended for general laboratory use where inlet pressure does not vary greatly (such as liquefied gases) and where high purity is not a consideration.


Brass Single-Stage Regulator Model SSD with FlowmeterStandard Features
  • Filter in Seat Assembly traps foreign matter, extends regulator life and reduces maintenance.
  • Neoprene Diaphragm permits accurate delivery pressure settings.
  • Outlet metering valve provides flow control.
Optional Features
  • Relief Valve protects regulator components from the effects of overpressurization.


Maximum Inlet Pressure:
  SSD: 3000 psig
  SSE: 300 psig

Inlet Pressure Gauge (dual scale):
  SSD: 0–4000 psig/0–275 bar
  SSE: 0–400 psig/0–27 bar

Delivery Pressure Range

Delivery Pressure Gauge

Gauge Size: 2" Dial

Operating Temperature Range:
  Regulators with Flowmeters:
     32°F to 165°F
  Regulators without Flowmeters:
     -40°F to 165°F

Flow Coefficient:
  Regulator: Cv = 0.18
  Outlet Valve: Cv = 0.4

Inlet Connection:
  SSD: CGA 296, 320, 326, 346, 350, 540, 580, 590 or 660 as ordered
  SSE: CGA 300, 510 or 660 as ordered

Outlet Connection:
  1/4" NPT male (on outlet valve)
  1/8" NPT female (on flowmeter) SSD Regulator

Optional Relief Valve Vent Connection:
  1/4" NPT male

Supply Pressure Effect: 1.0 psi per 100 psi

Approximate Weight: 4 lbs

Materials of Construction
Body: Brass Bar Stock
Outlet Valve and Gauges: Brass
Bonnet: Painted Zinc
Other Metal Parts Exposed to Gas:
  Brass and Stainless Steel
Seat and Seals: PTFE
Diaphragm: Neoprene
Flowmeter: Series 50 Flowmeter, Model FM4350

Optional Equipment

Equipment Part No.
Relief Valves:  
for SSD-15, SSE-15 RV5572-25i
for SSD-50, SSE-50, SSD-600 Series and SSE-600 Series RV5572-90i
for SSD-125 and SSE-125 RV5572-140i
 for SSD-250 and SSE-250 RV5572-300i

Table I, Regulators with Metering Valves

    Delivery Pressure
Part No
Model SSD
Part No.
Model SSE
(dual scale)
SSD-15-(CGA) SSE-15-(CGA) 2–15 0–30 0–2
SSD-50-(CGA) SSE-50-(CGA) 4–50 0–100 0–7
SSD-125-(CGA) SSE-125-(CGA) 10–125 0–150 0–10
SSD-250-(CGA) SSE-250-(CGA) 20–250 0–400 0–27

Table II, Regulators with Flowmeters

All regulators with flowmeters have a delivery pressure range of 4–50 psig and are
equipped with 0–100 psig pressure gauge on the delivery side.

Part No.
Model SSD
Part No.
Model SSE
Flowmeter Range,
Air at 70°F and 14.7 psia
SSD-600-(CGA) SSE-600-(CGA) 8–50 sccm
SSD-601-(CGA) SSE-601-(CGA) 5–85 sccm
SSD-602-(CGA) SSE-602-(CGA) 40–440 sccm
SSD-603-(CGA) SSE-603-(CGA) 100–950 sccm
SSD-604-(CGA) SSE-604-(CGA) 0.2–1.8 slpm
SSD-605-(CGA) SSE-605-(CGA) 0.4–3.6 slpm
SSD-606-(CGA) SSE-606-(CGA) 0.5–7.0 slpm
SSD-607-(CGA) SSE-607-(CGA) 1–13 slpm
SSD-608-(CGA) SSE-608-(CGA) 6–24 slpm
SSD-609-(CGA) SSE-609-(CGA) 4–44 slpm
Where “(CGA)” is indicated in Tables I and II, insert appropriate Compressed Gas Association
connection number to complete the part number. Example: SSD-15-580 or SSD-600-580.
Order by complete number.