Griffco pulsation dampeners are designed to enhance the performance of the chemical feed systems by reducing harmful shock waves and delivering continuous chemical dosage at the injection point.
Sizes and Pressure Ratings
1/2″, 3/4”, 1″, and 2″ connections (NPT, BSPT, Union, Flange, Socket)
Plastic bodies: 150 psi (10 bar) max. Metal bodies: 10 to 1,000 psi (0.7 to 69 bar).
Why Chemical Feed Systems Need Pulsation Dampeners
Metering pumps deliver flow in pulses — each stroke fires a burst several times the average rate, then a lull. A Griffco pulsation dampener evens it out: a gas cushion behind the diaphragm absorbs the excess energy on the pump’s discharge stroke and gives it back as the pump refills, filling the trough of the curve. That flattens the pulsation wave into smooth, centrifugal-like flow — the steady delivery of a centrifugal pump with the precision of a metering pump.
That protects the whole feed system:
- Accurate dosing — pulses over- and under-dose at the injection point; steady flow holds the dose you set (critical where the dose is the product: chlorine, coagulant, pH).
- Reliable readings — meters and gauges can’t read a pulsing line; dampened flow gives usable data and longer instrument life.
- Less fatigue and water hammer — spikes crack fittings and cause leaks; smoothing them extends system life and cuts chemical-exposure risk.
- Lower peak pressure — mitigating the spikes protects every downstream component.
Inlet Stabilizers
The suction side needs protection too. Griffco inlet stabilizers reduce inlet water hammer and/or excess head pressure above the pump inlet rating, acceleration head losses in suction lift applications, and inlet cavitation — helping the pump fill completely on every stroke.
Sizing Your Dampener
An undersized dampener won’t absorb the pulse, and an oversized one adds cost for no benefit. Sizing depends on the pump’s displacement per stroke, stroke rate, line size and length, and operating pressure.
Use the free Griffco Pulsation Dampener Sizing Calculator (also available in metric). Enter your pump and piping details and the results are emailed to you.
Sizes, Pressures and Materials
- 22 volumetric sizes
- Connections: 1/2″, 3/4″, 1″ and 2″ — NPT, BSPT, union, flange and socket
- Maximum pressure: 150 psi (10 bar) for plastic bodies. Metal bodies are offered from 10 to 1,000 psi (0.7 to 69 bar). For service above 1,000 psi (69 bar), see the Fox S.r.l. line.
- Dampening performance: up to ±2.5% residual pulsation, depending on the application.
- Body materials and maximum temperature: Noryl® 225 °F (107 °C); PVDF 225 °F (107 °C); polypropylene 175 °F (79 °C); PVC 140 °F (60 °C); 316 stainless steel depends on the diaphragm
- Diaphragms: EPDM (standard); Viton® or Hypalon® (optional)
- Gauge and charging valves: brass (standard) or 316 SS
- Gauge ranges: 0–160 psi (0–11 bar) standard; 0–60 psi (0–4.1 bar), 0–100 psi (0–6.9 bar), 0–200 psi (0–14 bar) and 0–250 psi (0–17 bar) optional
- Built in the USA, with robust machined construction
Charging and Maintenance
Griffco dampeners use a gas pre-charge behind the diaphragm. A gauge shows the charge pressure at a glance. Check the charge regularly and recharge through the charging valve as described in the installation and operation manual. Dampeners may be charged with either compressed air or nitrogen. A pulsation dampener charging kit and a filling and testing kit are available.
Frequently Asked Questions
Where should the dampener be installed?
On the pump discharge, as close to the pump as practical, and no more than 10 pipe diameters of the discharge line away from the pump. Follow the IOM manual for orientation and piping.
What if I need higher pressure or a more aggressive chemical?
Griffco pulsation dampeners are rated to 1,000 psi (69 bar). For duties above that, or for chemistries and constructions outside the materials listed above, Griffco offers the Fox S.r.l. line. Griffco is an exclusive partner for the Fox product line — pulsation dampeners and suction stabilizers spanning eight technology families, from 145 psi (10 bar) to 20,000 psi (1,379 bar), manufactured under an ISO 9001 certified quality system.
The Fox range covers membrane, bladder, in-line and direct-contact designs for oil and gas, chemical processing and high-pressure dosing applications. Griffco supports Fox globally — contact us or your local distributor and we will route your application to the right technology.
Where can I buy Griffco pulsation dampeners?
Through Griffco’s worldwide distributor network, or request a quote.
Pulsation Dampeners
Features
- 22 volumetric sizes available
- Up to ±2.5% residual pulsation, depending on the application
- Operating pressures up to 1,000 psi (69 bar) – Metals, 150 psi (10 bar) – Plastics
Griffco Benefits
- High reliability at an affordable price
- Robust, machined construction
- Made in USA
Wetted Materials
Materials of Construction
Noryl® (Max Temp: 225 °F / 107 °C)
PVC (Max Temp: 140 °F / 60 °C)
Polypropylene (Max Temp: 175 °F / 79 °C)
PVDF (Max Temp: 225 °F / 107 °C)
316 SS (Diaphragm Dependent Temp)
Diaphragm Material
Std: EPDM
Optional: Viton®, Hypalon®
Gauge & Charging Valves
Std: Brass
Optional: 316 SS
Options
Std: 0–160 psi (0–11 bar)
Optional: 0–60 psi (0–4.1 bar), 0–100 psi (0–6.9 bar), 0–200 psi (0–14 bar), 0–250 psi (0–17 bar)
Gauge port sizes of 1/8″, 1/4″, 1/2″
Image | Product | Description | Add to Project |
|---|---|---|---|
 PD0011PV01S | Viton – Economy 160 psi Gauge – Socket connection | ||
PD0011PV01U | Viton – Economy 160 psi Gauge – Union Connections** | ||
PD0011PV02 | Viton – Economy 60 psi Gauge** | ||
PD0011PV03 | Viton – Economy 100 psi Gauge** | ||
PD0011PV04 | Viton – Economy 200 psi Gauge** | ||
PD0011PV05U | Viton – Economy 300 psi Gauge – Union Connections* | ||
PD0011PV11 | Viton – Mid Range 160 psi Gauge** | ||
PD0011PV11M | Viton – Mid Range 160 psi Back Mount Gauge** | ||
PD0011PV11S | Viton – Mid Range – 160 psi Gauge – Socket connection | ||
PD0011PV11UZ | Viton – Mid Range 160 psi Gauge – Threaded Union Connection** |
| TITLE | DESCRIPTION | DATE MODIFIED | DOWNLOAD |
Don’t See What You’re Looking For?
If you need something Bigger or More Complex than our standard Pulsation Dampeners above, then here’s where to go! Click the Fox S.r.l. button to proceed.
Pulsation Dampener Sizing Calculator
Sizing the pulsation dampener properly will help you prevent water hammer and reduce friction losses in your discharge line. Click below to use our Pulsation Dampener Sizing Calculator.