Pressure Regulators - Laboratory/Analytical Products - Model 8311

8311 The Parker Models 8311 regulators incorporate a threadless valve seat assembly with a precision glass ball. They are ideal for low flows and provide bubble-tight shut-off on dead end systems. The Models 8310 and 8311 are direct acting, non-relieving pressure regulators with a replaceable sintered stainless steel cartridge filter on the inlet. They can be equipped with stainless steel diaphragms to reduce permeability. These regulators are performance tested under simulated operating conditions and cleaned for analytical instrument service.


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PARKER PRESSURE REGULATORS
Parker Models 8311

The Parker Models 8310 and 8311 Regulators incorporate a threadless valve seat assembly with a precision glass ball. They are ideal for very low flow applications and provide bubble tight shut-off under most conditions. The 8310 and 8311 are direct acting, non-relieving pressure regulators supplied with a replaceable sintered stainless steel cartridge filter on the inlet. They can be equipped with stainless steel diaphragms to reduce permeability. These regulators are performance tested under simulated operating conditions and cleaned for analytical instrument service.

• Direct acting
• Non-relieving
• Pressure gauge connection
• Compact design
• Suitable for panel mounting
• All bar stock construction
• Bubble tight shut-off
• Cleaned for analytical service

Materials of Construction
Body
Aluminum or Stainless Steel
Bonnet
Aluminum
Orifice
Stainless Steel
Diaphragm
Fairprene BN-5029 (Buna N on nylon), Stainless Steel or Viton®
Range Spring
Music wire or Ni-Span-C®
O-Rings
Buna N or Viton®
Filter Element
Sintered Stainless Steel

Specifications
Ratings
Maximum inlet pressure: 250 PSIG
Maximum working temperature: 160°F
Pressure Drop
Minimum: 10 PSI
Maximum: 250 PSI
Performance
(Based on 60 PSIG helium supply pressure at 50 PSIG outlet pressure)
Supply Rejection:
10 PSI change in supply will not change outlet more than 0.07 PSI
Ambient Temperature Effect
(temperature coefficient):
Music wire – (60 PSIG range) 0.008 PSI/°F
Ni-Span-C® - (60 PSIG range) 0.004 PSI/°F
Drift (Fairprene diaphragm):
Less than 0.1% in first 15 minutes to a total of 0.2% long term
(Stainless steel diaphagm):
Less than 0.2% in first 15 minutes to a total of 0.8% long term


Flow Regulation
From 2 SCCM to 250 SCCM helium, outlet pressure will not decrease more than 0.17 PSI for unit with Fairprene diaphragm, 0.3 PSI for unit with stainless steel
diaphragm
Baseline Oscillation: 0.0012 PSI
Precision Adjustment (resolution): 15 turns
Regulating Range
0 - 2.5 PSIG
0 - 5 PSIG
0 - 10 PSIG
0 - 30 PSIG
0 - 60 PSIG
0 - 100 PSIG
Connections
8310: 1/8" FNPT side ports, inlet, outlet and gauge
8311: Bottom ports with 1/8" compression fittings, inlet, outlet and gauge

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