S-type check valve 
 The role of the S-type one-way valve so that oil can only flow in one direction, and the other reverse stop flow. 
 Connection: the tube plate. 
 http://www.jnlsl.cn/showproduct.asp?big=1&small=8&list=19&proid=40 
 RVP-type one-way valve 
 So that oil can only flow in one direction, while only flow in the other direction. Connection: plate. 
 http://www.jnlsl.cn/showproduct.asp?big=1&small=8&list=20&proid=39 
 Z1S stacking one-way valve 
 For vertical stacking. This valve body and one-way valve plug. 
 One-way valve leak closure in one direction, to allow free circulation in another direction. 
 Stroke of the poppet valve in the bore by the restrictions of the spring seat. The built-in spring so that the poppet valve is closed and to keep it in the closed position. 
 http://www.jnlsl.cn/showproduct.asp?big=1&small=8&list=21&proid=38 
 SV / SL 4X series of pilot-operated check valve 
 For backplane mounting surface according to DIN24340 Type, ISO5781 and CETOP-rp, 121H backplane 
 For the thread to understand 
 3, with or without unloading port 
 4, with or without the uninstall feature 
 5, with the uninstall feature of the model: for smooth operation (reduce the possibility of opening impact) 
 6, four opening pressure 
 http://www.jnlsl.cn/showproduct.asp?big=1&small=8&list=22&proid=37 
 Z2S type stacking pilot controlled check valve 
 It is used to turn off one or two working ports, leak duration, stability is good, oil free circulation, the reverse is closing. Apply to vertical stacking. 
 http://www.jnlsl.cn/showproduct.asp?big=1&small=8&list=23&proid=36 
 Z2S6 6X series stacking pilot controlled check valve 
 1, the stacking structure 
 2, the mounting surface according to DIN 24340, A-type 
 Required one or two working ports, leak-tight seal 
 4, applies to vertical stacking 
 5, three different opening pressure 
 http://www.jnlsl.cn/showproduct.asp?big=1&small=8&list=24&proid=35