PP stopcocks have plugs made of PTFE and are autoclavable. Maximum temperature is 275°>F (135°>C); maximum pressure is 10 psi; (Nalgene®). PVDF stopcocks are rated for 464°>F (240°>C); maximum pressure is 5 psi. LDPE stopcocks are rated for 167°>F (75°>C); maximum pressure is 7 psi. HDPE stopcocks are rated for 203°>F (95°>C); maximum pressure is 7 psi.
