Griffco Valve
Chemical metering pump ancillary equipment — back pressure valves, injection quills, gauge guards, and a real quantified 98+% sulfuric acid material bulletin.
Griffco Valve makes accessories for chemical metering pump systems: G-Series, M-Series, and Unibody back pressure and pressure relief valves, injection quills sold by insertion length (1.5 to 24 inches), gauge guards, and pulsation dampeners. For 98.3% and stronger sulfuric acid, Griffco's bulletin recommends Halar (ECTFE) or one-piece flanged PTFE.
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].
Griffco Valve models in the LibertyCES catalog
10 models across 9 product lines. For most models that state them (the middle 80%): connection sizes 0.5–1.5 in. Extremes are in the table.
| Model / line | Type | Size / capacity / flow | Pressure | Temperature | Wetted material | Source |
|---|---|---|---|---|---|---|
| Pulsation Dampener PD series | Instrumentation/Accessory | 6.0-125.0 cu in | 250 psi (17.2 bar) | 225F max (Noryl/PVDF); 140F PVC; 175F PP; 250 psi max (150 psi plastics, 1000 psi metals) | body: Noryl/PVC/PP/PVDF/316SS; diaphragm: EPDM standard, Viton/Hypalon optional | Manufacturer documentation on file |
| Back Pressure Valves G-Series | Valve | 1/2"-1.5" typical | see sulfuric acid bulletin for chemical-specific limits | varies by size/service (PVC/CPVC/PVDF/316SS/Alloy 20 options) | Griffco Valve — Chemical Feed System Accessories | |
| Back Pressure Valves Unibody | Valve | 1/2"-1" typical | see sulfuric acid bulletin for chemical-specific limits | varies by size/service | Griffco Valve — Chemical Feed System Accessories | |
| Pressure Relief Valves High-Pressure Series | Valve | 1/2"-1" typical | see sulfuric acid bulletin for chemical-specific limits | varies by size/service | Griffco Valve — Chemical Feed System Accessories | |
| Chemical Injection Valves/Quills Injection Valve/Quill | Fitting | 1"-1.5" body, 1.5"-24" insertion length | 316SS, CPVC, PVC, PVDF, Hastelloy C, Alloy 20 | Griffco Valve — Chemical Feed System Accessories | ||
| Corporation Stops Corporation Stop | Valve | 1/2"-1" typical, 4"-48" quill length | 316SS, CPVC, PVC, Brass, Alloy 20, Hastelloy C | Griffco Valve — Chemical Feed System Accessories | ||
| Gauge & Instrument Guards Gauge Guard (Economy/Mid/Premium) | Instrument | 1/4"-1/2" typical | 316SS, CPVC, Hastelloy C | Griffco Valve — Chemical Feed System Accessories | ||
| Pulsation Dampeners Pulsation Dampener (economy line) | Pump Accessory | 10-62 cu in observed | 160 psi (11 bar) | 160 psi gauge (economy line) | Noryl, Viton | Griffco Valve — Chemical Feed System Accessories |
| Y-Strainers Y-Strainer | Strainer | 1"-1.5" typical, 20-325 mesh | 150# flanged option | 316SS, 316L SS, CPVC, PVC, Clear PVC | Griffco Valve — Chemical Feed System Accessories | |
| Calibration Columns Calibration Cylinder | Instrument | 100 mL-1000 mL typical | CPVC, PVC, Glass | Griffco Valve — Chemical Feed System Accessories |
This table is part of the equipment catalog dataset (CSV and JSON).
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Reviewed by James Riggins, 30+ years specifying water and chemical process equipment · Updated