Griffco Valve
Chemical metering pump ancillary equipment — back pressure valves, injection quills, gauge guards, and a real quantified 98+% sulfuric acid material bulletin.
What LibertyCES specifies from Griffco Valve
Back pressure valves also function as anti-siphon protection; Unibody design eliminates extra unions/fittings for leak-free connections.
316SS, CPVC, PVC, PVDF, Hastelloy C, or Alloy 20 — sold by insertion length, the critical dimension for correct fit into a specific pipe or tank penetration.
Griffco Valve — Real Catalog Spec Data
| Product Line | Model | Category | Material | Size / Capacity | Temp Rating |
|---|---|---|---|---|---|
| Pulsation Dampener | PD series | Instrumentation/Accessory | body: Noryl/PVC/PP/PVDF/316SS; diaphragm: EPDM standard, Viton/Hypalon optional | 6.0-125.0 cu in | 225F max (Noryl/PVDF); 140F PVC; 175F PP; 250 psi max (150 psi plastics, 1000 psi metals) |
| Back Pressure Valves | G-Series | Valve | varies by size/service (PVC/CPVC/PVDF/316SS/Alloy 20 options) | 1/2"-1.5" typical | see sulfuric acid bulletin for chemical-specific limits |
| Back Pressure Valves | Unibody | Valve | varies by size/service | 1/2"-1" typical | see sulfuric acid bulletin for chemical-specific limits |
| Pressure Relief Valves | High-Pressure Series | Valve | varies by size/service | 1/2"-1" typical | see sulfuric acid bulletin for chemical-specific limits |
| Chemical Injection Valves/Quills | Injection Valve/Quill | Fitting | 316SS, CPVC, PVC, PVDF, Hastelloy C, Alloy 20 | 1"-1.5" body, 1.5"-24" insertion length | - |
| Corporation Stops | Corporation Stop | Valve | 316SS, CPVC, PVC, Brass, Alloy 20, Hastelloy C | 1/2"-1" typical, 4"-48" quill length | - |
| Gauge & Instrument Guards | Gauge Guard (Economy/Mid/Premium) | Instrument | 316SS, CPVC, Hastelloy C | 1/4"-1/2" typical | - |
| Pulsation Dampeners | Pulsation Dampener (economy line) | Pump Accessory | Noryl, Viton | 10-62 cu in observed | 160 psi gauge (economy line) |
| Y-Strainers | Y-Strainer | Strainer | 316SS, 316L SS, CPVC, PVC, Clear PVC | 1"-1.5" typical, 20-325 mesh | 150# flanged option |
| Calibration Columns | Calibration Cylinder | Instrument | CPVC, PVC, Glass | 100 mL-1000 mL typical | - |
Sourced from Griffco Valve's own catalog documentation.
Frequently Asked Questions
What material should be used for 98+% sulfuric acid service?
At 98.3%+ concentration, sulfuric acid carries sulfur trioxide, which attacks PVDF and Noryl. Griffco's own bulletin recommends Halar (ECTFE) or one-piece flanged PTFE (both rated to 100% at 200°F) or Alloy 20 (100% at 300°F) — threaded PTFE connections should be avoided due to cold-flow leak risk.
What is the difference between a Griffco back pressure valve and pressure relief valve?
A back pressure valve applies continuous back pressure to a chemical feed pump while preventing gravity/siphon-induced overfeed. A pressure relief valve, also marketed as a high-pressure pump bypass valve, protects the system from over-pressure caused by defective equipment or line blockage.
How are Griffco chemical injection quills sized?
By insertion length, not just valve body size — quills range from 1.5" to 24" insertion length, which must match the specific pipe or tank penetration depth for correct fit.
Get the right chemical feed accessory for your concentration
Ready to buy or need a fast answer? Call, text, or email James directly — (559) 395-5500 · [email protected].