Advanced Specialty Gas Equipment

Models SG3504, SG3505
Brass, High Purity, Miniature Lecture Bottle Regulators

These small lightweight regulators, designed for mounting directly on lecture bottles, are recommended for High and Ultra High Purity, inert and noncorrosive gas service. They are available in two delivery pressure ranges (4–75 and 5–150 psig) and with either CGA 110, 170 or 180 connections.

Standard Features
  • Metal Diaphragm minimizes diffusion of air into regulator and eliminates "off gassing" associated with elastomeric diaphragms, thus maintaining gas purity.
  • High Purity Regulator Design permits vacuum purging of regulator.
  • Filter in Inlet traps foreign matter, extends regulator life and reduces maintenance.
  • Compact Miniature Size provides for ease of use with lecture bottles.

Maximum Inlet Pressure: 3000 psig

 Inlet Pressure Gauge (dual scale):
  0–4000 psig / 0–275 bar

Delivery Pressure Range

Delivery Pressure Gauge

Gauge Size: 1 1/2" Dial

Operating Temperature Range: -40°F to 140°F

Flow Coefficient:
  Regulator: Cv = 0.06

Inlet Connection: CGA 110, 170 or 180 as ordered

Outlet Connection:   1⁄8" NPT female

Supply Pressure Effect: 1.0 psi per 100 psi

Approximate Weight: 2 lbs

Materials of Construction
Body: Brass Bar Stock
Gauges: Brass
Bonnet: Black Anodized Aluminum
Other Metal Parts Exposed to Gas: Brass and   Stainless Steel
Diaphragm: Elgiloy®
Seals: PTFE

Optional Equipment

Equipment Part No.
Adaptor: CGA 110 (male) to CGA 180 (male), including washers LB3534
PTFE washers (package of 25)  
  for CGA 110 SG3540
  for CGA 170 SG3542
  for CGA 180 SG3541
Compression Fittings* (male connectors)  
  1/8" NPT male x 1/8" compression SG6701
 1/8" NPT male x 1/4" compression SG6702
* If selected, these items are not installed on the regulator. They are shipped as separate items.

Table I

Part No. Delivery Pressure
Range Gauge (dual scale)
(psig) (psig) (bar)
SG3504-(CGA) 4–75 0–100 0–7
SG3505-(CGA) 5–150 0–200 0–14
Where "(CGA)" is indicated above, insert appropriate Compressed Gas Association connection
number to complete the part number. Example: SG3504-110. Order by complete part number.