Seals for reciprocating applications Grooves seals - type K - rubber and composite (plastic with protective rubber rings) are intended for seals of hydraulic devices, operating at pressures to 16 bar / no protective ring and up to 32 bar / with protective ring. NRB - Acrylic-butadiene rubberPU - Polieretan ypeRef Pressure( bar ) Temp( C )Speed ( m/s ) terialSize etr.inch MA 28 Piston seal 400 -40 +100 0,5 PU 92 yes MA 30Rod seal 400 -40 0,5 PU 92 yes yes MA 39 Rod seal 400 -40 +100 0,5 PU 92yes yes MA 41 Rod seal 400 -40 +100 0,5 PU 92 / POMyes yes