Screw valve

Purpose
Screw valve is a kind of primary device for controlling flow or flow rate of powder, grain, particle, and small piece material. It is widely used for such sectors including mining, grain, etc. for regulating flow or cutting rapidly (special material diameter ≤50mm).

Category	A×A	B×B	C×C	L	H	D0	n-d
One-way	220×200	256×256	296×296	100	820	300	8-φ12
	250×250	306×306	346×346	100	930	340	8-φ14
	300×300	356×356	396×396	100	1050	380	8-φ14
	400×400	456×456	496×496	100	1140	445	12-φ14
	450×450	510×510	556×556	120	1450	530	12-φ18
	500×500	560×560	606×606	120	1610	580	16-φ18
Two-way	600×600	660×660	706×706	120	1830	450	16-φ18
	700×700	770×770	820×820	140	2130	450	20-φ18
	800×800	870×870	920×920	140	2440	450	20-φ18
	900×900	974×974	1030×1030	160	2660	450	24-φ23
	1000×1000	1074×1074	1130×113	160	2870	450	24-φ23
Specification	LMD one-way	I hand wheel	Number of chain nodes M = 0.105×-113 (× means the distance of lead screw center from surface); use hand wheel if the height is less than 1.7 m; use chain wheel if the height is more than 1.7 m.
	LMD two-way	II chain

Note: Non-standard screw gate valve could be customized based on drawing or sample.