PULSAtron electronic metering pumps from Pulsafeeder have a guided check valve system with a seat-and-ball design that ensures reliable and accurate metering. Their fin-cooled solenoid enclosure dissipates heat, ensuring that the pressure-handling capability of the pump can be maintained. The thermally protected solenoid protects the pump from seizing up in extreme heat conditions with an automatic reset feature, allowing the pump to resume operation upon cool-down. Units are tested and rated under hot conditions so flow and pressure ratings meet specifications. They offer flows up to 600 gpd and pressures up to 300 psi, with a range of flows and pressures. Agency approvals include CE, ETL, ETL san. and NSF 61 approval on polyvinylidene fluoride material and degassing head models. 800-333-6677; www.pulsatron.com